ABOUT 2.0 - Update

This is a selection of other lists and articles on Web 2.0:

20culture - Article on Web 2.0 design trends
20websites - Categorized lists of Web 2.0 phenomena
3spots - Lists many Web 2.0 apps & websites
AI3 - Articles & lists re semantic softwares
Ajaxian** - Ajax blog
Alexaholic/Sethgodin - Ranking of 937 Web 2.0 companies, based on earliest version of my list
Allthingsweb2 - Extensive list of Web 2.0 companies, based on my first listings
Altsearch - Categorized list of Web 2.0 companies that are also in THIS list
Betafy - Get alerts about new Web 2.0 companies
Betalogoparade - Web 2.0 logo cloud
Bettingmarket - Article on P2P betting
Bioteams* - Blog on team dynamics & virtual collaboration
Blinklistsocial - Lists of 2.0 websites
Bozpage - Web 2.0 sources
Bubble20snarkgroup - Everything against Web 2.0
Businesssoftware - Article on running business on Web 2.0-based software
Buzzshout* - Review & rank Web 2.0 companies
Connectingthedots - 2.0 blog
Datamining - Reporting on new things with a focus on movies, NLP, blogosphere data & visualizing them
Dead20 - Anti-reviews of Web 2.0 phenomena
Dexly (olim Categoriz) - Catgorized list of Web 2.0 companies (heavily depending on Everything 2.0)
Diglog - Diggs Chinese Web 2.0 pages
Downloadsquad - Reviews Web 2.0 companies
Drweb - Collection of Web 2.0 navigation menus
Dumpr - Fun things for Flickr
Eboyweb20poster - Web 2.0 cityscape illustration
Econsultant - 2.0 list
Eyebeam*** - Bleeding edge R&D
Flagrantdisregardslideshow - Slideshow of Web 2.0 pages
Forummatrix - Compare forum software
Gabinetedeinformatica - Reviews Web 2.0 sites (Spanish)
Gapminder - Visualise Google search statistics
Genbeta* - 2.0 blog (Spanish)
Go2web20 - Web 2.0 logo wall
Greatflickrtools - Extensive list of Flickr apps & mash-ups
Itredux* - Concise categorized database of Office 2.0 companies
Iwantto - What do you want to do or make online?
Jobsearch2.0 - List of job boards 2.0
Klabol - Web 2.0 list
Koolweb2.0 - Find & rank 2.0 websites
Koreacrunch - Reviews Korean 2.0 companies
Listofweb20 - List of lists with Web 2.0 websites
Mapstars~ - Refers to map mash-up tools & experiments (many Dutch)
Marco - How not to launch a Web 2.0 site
Mashable - 2.0 blog
Mashupfeed - RSS alerts for mash-ups
Matriceservices - Web 2.0 annotated logo cloud
Momb - 2.0 list
Monkeybites - 2.0 blog
Mustseeblog - Comparison of 40+ Video 2.0 pages
Ñblog - 2.0 blog
Nederkaart~ - Refers to map mash-ups (many Dutch)
Office-20database - Detailed spreadsheet with online Office-like apps
Pagecharts - Compare Alexa scores of up to 5 websites
Peerplink - Digg Web 2.0 websites (password protected)
Personalinfocloud - Blog about ubiquitous content
Programmableweb** - Web 2.0 reference website, main source on APIs and mash-ups
Publishing2** - Web 2.0 from a publishing & marketing point of view
Readwriteweb - Reviews Web 2.0 things
Roxomatic - Social bookmarking review
Saulweiner - Meta Web 2.0 list
Semanticthoughts - Get all 2.0 lists in OPML
Shamblesweb2 - Categorized 2.0 list
Solutionwatch - Reviews & lists of school & study tools
Solutionwatch* - Reviews of 2.0 websites
Soundblog - Reviews & lists of sound apps (& other cool stuff)
Stabilo-boss - Web 2.0 annotated logo cloud
Sys-con - Multimedia magazine
Techcrunch - 2.0 blog
Techcrunch - Comparison of mapping services
Theglump - 2.0 blog (French)
Top10webdeveloperlibraries - Annotated top 10 of developer libraries
Top25Finance20 - List of FINANCE 2.0 apps & services (peculiar similarities with my list...)
Treemaptechniques - Comprehensive article
Virtualkarma - Web 2.0 list
Virtualworldsreview - Lists & reviews virtual worlds
Vitamin - Resource for designers, developers & entrepreneurs
Web20definition - Summary of updated Web 2.0 definition
Web20foreducators - Web 2.0 list
Web20interact - Rate & rank Web 2.0 sites (Icelandic)
Web20intheenterprise - List of enterprise solutions
Web20manifesto - Lessons for businesses
Web20principles - Recap of updated 'official' O'Reilly definition of Web 2.0
Web20show - Podcasts about Web 2.0 companies
Web20strategy - Does every organization need one? Great article by Dion Hinchcliffe
Web2journal - Web 2.0 magazine
Web2list - Digg 2.0 websites
Web2logo - Web 2.0 logos
Web2null - 2.0 blog (German)
Web2reddit - List; vote on Web 2.0 companies
Web2slides - Slow slideshow of (old version of) THIS list
Webby20 - Thumb 2.0 list
Webosphere - 2.0 blog
Websnext - Slideshow of Web 2.0 sites
Whatsweb20 - Shortest list of Web 2.0 companies
Widgetoko - Aggregates social widgets
Wikimatrix - Compare wikis
Woeba - How to Web 2.0 list
Wsfinder - Search APIs and web services
Wwwhatsnew - 2.0 blog

Italic = new. Update 070127.

T - Z; Update

TTT
Tabblo - Upload, edit, compose & share your photo albums - Images
Tag2find - Tag & find everything on your hard disk - Tag
Tagacloud - Add your domain to cloud & promote both - Marketing
Tagalag - Tag & map your contacts - Community
Tagblitx - One-stop-bookmarking tool - Bookmark
Tagbulb - Meta tag search - Search
Tagcloud - Folksonomied, personalized tag clouds - Tag
Tagcrowd - Processes frequency based "tag" cloud from any text file - Tag
Tagdirectory - Tagged business directory - Marketing
Tagfacts - Tag & share your notes - Tag
Tagfetch - Folksonomy meta tag search - Search
Tagged - Tag yourself and the ones you love - Community
Taggle - Social bookmarking, tagged (German) - Bookmark
Tagground - Search for URLs by tag or v.v. - Search
Taghop - Digg links - Dig
Tagjag - Meta search (formerly Gada.be) - Search
Taglines - News in tags - News
Taglocity - Add tags to all Outlook files - Tag
Tagnautica - Search Flickr - Search
Tagspy - I tag so I am - Tag
Tagsy - Social bookmarking & feed management - Tag
Tagthenet - Text2Tags - Tag
Tagtooga - Social bookmarking - Bookmark
Tagworld - Share music & photos - Multimedia
Tagzania - Share & map places - Geo
Tailrank - Read news (ranking through algorithm) - News
Talkdigger - Search & discuss results from blogs & web - Search
Talkinghub - Add tags to your forum - Tag
Talkr - Convert blog text to podcasts - Publish
Talkshoe - Chat, talk 1:1, host a talkshow - Communicate
Talkster - Mobile2IM for free - Communicate
Talktrust - Call anonymously - Communicate
Tallstreet - Trade search results like stock market - Search
Tanbul - Google-like search, better algorithm for user input - Search
Tantricsoulmateconnection - Matching based on horoscopes etc. - Date
Tapgad - Get & reply to email thru sms - Communicate
Tapoll - Create, manage & predict outcome of polls - Survey
Tapuxmobile* - Mobile fun & community content & apps - Software
Targetedpixel - Buy pixel space for 5 years - Marketing
Targetyournews - Control who sees your news submission - News
Taskfreak - Task manager online - Organize
Taskspro - Group task manager - Organize
Taskthis - Manage, publish & share task lists - Organize
Tasktoy - Create lists, notes & memos - Office
Tastydish - Report, tag & share restaurants - List
Tastydrop - Submit & rate wines - Ecommerce
Teamslide - Collaborate on presentations - Office
Teamspinner - Organize & manage your projects - Organize
Teamworklive - Communicate, collaborate & share information - Collaborate
Techcheatsheets - Share cheats - Bookmark
Techcrunch - 2.0 blog - About
Techcrunch - Comparison of mapping services - About
Techdirt - Share your opinion & get paid for it - Publish
Techmeme - Automated tech news aggregator - News
Technoranki - Rank blogs - Rate
Technorati* - Find what people are saying - Search
Technoratikitchen - Saerch for microformats - Search
Techzingo - Tagged tech news - News
Teleflip - PC2Text - Communicate
Tellfriends - Publish, rate & share things you like - Community
Tello - Locate & collaborate with your key contacts - Communicate
Tempinbox - Receive inmail anonymously - Communicate
Tenbills - Design & buy your T - Ecommerce
Tendango - Top 10 list community - List
Tenhunt - 10 questions, 10 sites, best & fastest wins - Marketing
Terk~ - Meta search for articles - Ecommerce
Terraims - Create & publish your own map markers - Publish
Textamerica - Mobile blog - Publish
Textdrive - Hosted applications - Store
Textmarks - Customize your own sms info service - Communicate
Textorizer - Image2Text - Images
Textpattern - Web publishing system - Publish
Textpayme - Mobile P2P micropayments - PSP
Textsnippets - Share code - Software
Tezaa - Create, modify & participate in polls - Survey
TFD - Personal portal - Portal
Thandora - Tag based search in yellow pages - Ecommerce
The100lists* - Publish & share your lists - List
Theadcloud* - Create & tag classified listings - Marketing
Theadreview - Digg advertizing - Dig
Thebeststuffintheworld - Submit, rank & share the best whatever - Knowledge
Theblackstripe - Upload & share photos - Community
Thebroth - Collaborate & share glob al mosaic - Community
Thedailyplate - Search foods & find healthiest options - Search
Thefind - Shopping search - Search
Theglump - 2.0 blog (French) - About
Theinjuries - Share knowledge & experiences about industrial injuries - Knowledge
Themintpages - Recommend & share reviews on beauty products - Ecommerce
Thenorp - Digg porn links - Dig
Thepool - P2P sports betting - Gamble
Theport - Create & host your own news aggregator - News
Thethingsiwant - Create & share whis lists with photos - List
Theuncensored - Upload, share & rate porn - Porn
Theunseenvideo - Video & weather mash-up animation - Video
Thewsx - Collectively predict Washington politics - Survey
Thinglink - Search, label & share things of interest - Office
Thinglinks - Connect virtual with real world thru sema codes - Tag
Thinkature - Collaborative workspace - Office
Thinkfree - Web-based office suite - Office
Thisnext - Shopping recommendation network - Ecommerce
Thisplaceiknow - Share places - Marketing
Thnlnk - Semantic URL shortener - Software
Thoos - Social networking for athletes - Community
Threadless - Submit & rate T-shirt designs - Ecommerce
Thumblicious - Displays thumbs of most pupular delicious sites - Bookmark
Thumbq - Upload & manage images - Images
Thumbstacks - Make & share presentations online - Office
Tick - Time tracking app for teams - Organize
Tickethappy - Shared CRM management - CRM
Tickle - Lifestyle community - Community
Tickme* - Find someone you like, tick him/her & see if he/she ticks you back - Date
Tickr - Flickr desktop ticker - Images
Tictap - Price comparison for mobile - Ecommerce
Tiddlywiki* - Publish and share notes - Publish
Tiggdo - Personal mobile portal - Portal
Tiktrac - Manage your time - Organize
Tilika - Share calendars - Office
Tiltomo - Search for similar photos - Search
Timeline - Visualize time-based events - Organize
Timetomeet - Share your schedule - Office
Timetracker - Keep track of time - Office
Tinfinger - Search persons - Community
Tinymce - Wysiwyg editor - Publish
TinytinyRSS - Feed reader - RSS
Tioti - Discover, download & discuss tv content - Video
Isporty (olim Tiredandtested) - Sports community - Community
Titantv - Filter out what's on tv - Video
Titlez - Get publishing market data from Amazon - Marketing
Tnook - Build, manage & trade your collections - Ecommerce
Toeat - Map & share restaurants - Geo
Togetherdating - Dating after personal introduction - Date
Toggl - Track time & meetings for teams - Organize
Toodledo - Manage your to-dos - Office
Toolstolife - Change yourself together! - Community
Toongum - Publish & share flash cartoons - Community
Top10webdeveloperlibraries - Annotated top 10 of developer libraries - About
Top25Finance20 - List of FINANCE 2.0 apps & services (peculiar similarities with my list...) - About
Topix - Share & discuss news - News
Topspot-ornot - Spot & review locations (map mash-up) - Geo
Toptaggers* - Tag, rank & share links - Search
Toptensources - Startpage - Search
Topufo - Publish & share encounters of 1st, 2nd & 3d kind - Video
Toread - Social bookmarking - Bookmark
Totoexpress - Hoste, collaborate on, share & deliver content - Multimedia
Touchstone - Suscribe to your news & alerts - RSS
Toufee - Create & publish flash presentations - Images
Tourbus - Find live music - Audio
Tourfilter - Get email alert when your favorite band is in town - Audio
Touristremover - Remove undesired objects & persons from your photos - Images
Towncrossing - Create & participate in communities - Community
Tracbac - Share, comment, revise & collaborate - Knowledge
Trackslife - Manage & share your to do-lists - Office
Traction - Enterprise multi-user blogging - Software
Tractis - Negotiate & sign contract, solve disputes online (stealth) - Legal
Tradebetx - Betting exchange - Gamble
Tradesports - Betting exchange - Gamble
Tradindex - Spread betting exchange - Gamble
Trailfire - Log & share your clickpaths - Community
Traincheck - Get an sms with the next 3 departure times - VAS
Traineo - Share your weight loss with your motivators - VAS
Trashbit - Register & share your code - Economy
Travbuddy - Submit & share travel stories - Publish
Treadr - Track & follow people online - Geo
Treemaptechniques - Comprehensive article - About
Treemo - Post, manage & share media online & mobile - Multimedia
Tree-nation - Plant a tree in Niger - Economy
Treinvizier~ - Actual whereabouts of Dutch trains - Geo
Trendalicious - Real time website popularity trends - Stats
Trendio - Bet on popular news - News
Trexy - Share your clickpaths - Bookmark
Tribe - Connects you to friends, neighborhoods & forums - Community
Tribler~ - Watch, rate & share video - Video
Tripconnect - Publish & share travel advice - Community
Triphub - Plan group trips - Community
Tripmates - Meet locals, get tips - Community
Tripmojo - Map & share hotels - Geo
Triporama - Plan, research & book trips together - Ecommerce
Tripster - Publish, recommend & share travel experiences (stealth) - Publish
Triptie - Mix your trip from trip plans by other users - Community
Trivionomy - Create, edit & play trivia game - Game
True - Dating, free of married people and other criminals - Date
Trueshare - Store, manage & share files - Store
Trumba - Create& share events - Office
Trustedopinion - Social recommendations engine (with visualisation of trusted circle of friends) - Ecommerce
Trustmymail - Spam filter based on your circle of contacts - Communicate
Truveo - Ranked video search - Video
Tubesnow - Create, invite & share - Community
Tudu - List & manage your tasks - Office
Tunecore - Create & sell music - Audio
Tunefeed* - Share your music on any website - Audio
Tunefind - Index of tv and movie music songs - Audio
Tunefind - Submit & find film & tv music - Search
Turboclip - Publish, access, manage & share bookmarks - Bookmark
Turbodbadmin - Online dbase in Ajax - Dbase
Turbogears - Rapid development framework - Software
Turn - Automate your online campaigns - Marketing
Turnhere - Upload & share video (local) - Video
Tutocle - Find, submit & share tutorials - Knowledge
TV - Filter out what's on tv - Video
Tvunetworks - Broadcast or view tv over IP - Video
Twango - Upload & share your media - Multimedia
Twerq* - Remember search results in tabs - Search
Twitter - Update your friends on what you're doing - Publish
Twocrowds - Share your predictions & have them assessed - Knowledge
Twones~ - Share your playlists & make new friends - Audio
Tworl - Chat with strangers - Communicate
Twttr - Share where you are thru your cell phone - Communicate
Txtmob - Share sms messages with your friends - Communicate
Txtsaver - Online notepad - Office
Typetester - Compare screen type - Design
Typolis - Blogging solution - Publish

UUU
Uask - Sell or buy for the price you want - Ecommerce
Uberchannel - Create & share your own channel - Video
Ufeed - Get RSS feeds in your own page - RSS
Uize** - Java API Library - Software
Ujiko** - Visual your search, manipulate results, manage your reputation (by the wizards from Kartoo); the more you use it, the more cool features you get - Search
U-lik - Build your virtual library & share it - Community
Ulinkx - Search, bookmark & share media - Multimedia
Ummyeah - Digg videos & news - Video
Umundo - Upload & share mobile videos and pix - Multimedia
Unalog - Share what you read, in groups - List
Uncutvideo - Aol's You Tube - Video
Unspun - Publish & share your best-of lists - List
Upcoming - Create, manage & share events - Office
Uplayme - Share music & meet people with same taste - Community
Upto11 - Discover & share music - Audio
Upwarded - Upload, rank & share multimedia - Multimedia
Urbandictionary - Contribute to slang dictionary - Vocubalary
Urbanplanet - Discuss urban (USA) issues - Community
Urbis - Community for creative people - Community
Urlex - Leave comments on any website - Bookmark
Urlfan - Real time blog reference search - Search
Urlx - Shorten your URL - Software
Userplane - Chat, messenger, record - Communicate
Userscape - Web-based help desk portal - CRM
Uspot - Upload & share media - Multimedia

VVV
V4s - Add voice to your email - Communicate
Valuewiki - Wiki for securities - Finance
Vanilla - Forum solution - Communicate
Vast - Car search - Search
Vcarious - Travel community - Community
Vcdiggz - Community based deal sourcing firm - Finance
Vcnewscentral - Digg start-up & VC news - Finance
Veeker - Shoot, send & share videos while you travel - Video
Veetro - Create & share online project space - Organize
V-enable - Mobile speech search - Search
Vennt - tag-based forum solution - Communicate
Veoh - Upload & share videos - Video
Veotag - Enrich media files with meta data & share - Multimedia
Verbdate - Speak up before you date - Date
Verisignpip - Personal identity provider - Identity
Veryfunnyads - Submit & vote for funny commercials - Video
Vflyer - Compose classified ads and multi-post them - Marketing
Vfxy - Photoblog syndication community - Images
Vicito - Group text service - Communicate
Viddler - Create, enhance & share your video - Video
Videobomb - Discover, digg & share videos on Democracy Player - Video
Videoegg - Capture, edit & publish video - Video
Videojug - Share know-how thru video - Knowledge
Videoronk - Meta video search - Search
Videosift - Upload, share & digg videos - Video
Videostumble - Link to, rate & share videos - Video
Videws - RSS news mashed up with Youtube videos - Video
Vidilife - Upload & share media - Multimedia
Vidivodo - Profile yourself & share media - Multimedia
Viewr - Publish on map & buy or sell homes, globally - Ecommerce
Viewscore - Product search & comparison engine - Search
Vimeo - Upload & share video - Video
Viralvideochart - Tracks the buzz around videos - Video
Virb - Upload & share multimedia - Multimedia
Virtualcity - Navigate map with help of photos (Toronto) - Geo
Virtualkarma - Web 2.0 list - About
Virtualvideomap - Google Maps & Youtube mash-up - Geo
Virtual-whiteboard - Work, think, design together - Organize
Virtualworldsreview - Lists & reviews virtual worlds - About
Visiblepath - Relationship management tools - CRM
Visualcomplexity - Visualize complexity - Software
Visualthesaurus - Find & visualize synonyms - Vocubalary
Visuarios - Publish & share how-to videos - Knowledge
Vitalist - Organize & share your tasks & projects - Office
Vitalsource - Publish & sell or buy books - Ecommerce
Vitamin - Resource for designers, developers & entrepreneurs - About
Vitamint - Explore & share tips, and get paid - Knowledge
Vitrue - White labeled advertizing video solutions - Software
Vivapop - Share schedules - Office
Vivirama - Put your home on this free international map - Geo
Vivisimo - Clustered search - Search
Vivox - Solutions for communities, communications, games - Software
Vizrea - Upload & share (camera phone) photo content - Images
Vizu - Create, share & vote for polls - Survey
Vlogmap - Map your vlog - Geo
Vmix - Upload & share videos - Video
VNCCasts - Watch live broadcasts of people's computer screens - Video
Vodpod - Publish your videos and/or playlists & share them - Video
Voices - Market place for voice overs - Economy
Voo2do - Organize your tasks - Office
Votemerich - Blog, campaign, vote & get rich - Economy
Voteo - Create, modify & participate in polls - Survey
Vox - Blog & share content - Multimedia
Vsocial - Upload, rank & share video - Video
Vtiger - Open source CRM - CRM
Vurbs - Dig videos - Video
Vyew - Meet, share, discuss & annotate in group sessions - Organize

WWW
W8alth - Get rich or become an investor - Finance
Wablet - Call & chat ID - Identity
Wadgetos - OS in your browser - OS
Wadja - Use & share the web on your mobile phone - Community
Wageexchange - Share your salary - Finance
Wallnote~ - Manage notes & to-do's - Organize
Wallop - Publish & share media - Community
Wampad - Experiments in speed search - Search
Wankr - Collaborative masturbation community - Fun
Warholit - Warholize your pics - Images
Wasabi - Share news with friends - Community
Watchingthewebflyby - Animated logo race - Ecommerce
Watchmedoing - Upload & share mobile videos - Video
Watchmouse~ - Site & server monitoring services - Software
Watchthisnext - Vote for & buy DVDs - Ecommerce
Watson - Add contextual search to all documents - Search
Wattpad - Publish & share stories on your cell phone - Publish
Watvindenwijover~ - Find & vote for information - Search
Waxmail - Add voice to your email - Communicate
Waxxi - Listen to & participate in podcasts - Audio
Wayfaring - Create & share your maps - Geo
Waymarkr - Turn your mobile into a life phlogging wearable - Images
Wayn - Log & share places & people - Community
Waypath - Search blogs - Search
Wazima - Coupon aggregator - Ecommerce
Weatherbonk - Mashes up 10 API's - Geo
Weatherbug - Share video weather casts - Video
Web20alizr - Generate & promote a 2.0 app automatically - Fun
Web20awareness - Check your last visited links to decide how 2.0-aware you are - Fun
Web20bingo - Bingo with 2.0 buzz words - Fun
Web20bullshitgenerator - Generate 2.0 speak - Fun
Web20definition - Summary of updated Web 2.0 definition - About
Web20domainnamegenerator - Find cool 2.0 names - Fun
Web20foreducators - Web 2.0 list - About
Web20generator - Generate a 2.0 web page - Fun
Web20interact - Rate & rank Web 2.0 sites (Icelandic) - About
Web20intheenterprise - List of enterprise solutions - About
Web20manifesto - Lessons for businesses - About
Web20map - Web 2.0 companies on map mash-up - Geo
Web20milliondollarhomepage - Pixel ads - Ecommerce
Web20namegenerator - Generates fancy web 2.0 brand names - Fun
Web20palette - Color palette for Web 2.0 design - Images
Web20principles - Recap of updated 'official' O'Reilly definition of Web 2.0 - About
Web20quiz - Web 2.0 brand or Star Wars character quiz - Fun
Web20show - Podcasts about Web 2.0 companies - About
Web20strategy - Does every organization need one? Great article by Dion Hinchcliffe - About
Web20stylr - Create your web 2.0 logography - Fun
Web20toolbar - Search on, submit to & get alerts from Web 2.0 websites - Portal
Web20validator - Screen your website on 2.0-ishness - Fun
Web2carz - Shop for cars, publish & share reviews of dealers - Ecommerce
Web2journal - Web 2.0 magazine - About
Web2list - Digg 2.0 websites - About
Web2logo - Web 2.0 logos - About
Web2messenger - Send messages from web 2 messenger - Communicate
Web2newswire - Publish, share & digg news - Publish
Web2null - 2.0 blog (German) - About
Web2reddit - List; vote on Web 2.0 companies - About
Web2slides - Slow slideshow of (old version of) THIS list - About
Webaroo - Search the web offline - Search
Webbrush - Collaborative drawing, charting, etc - Design
Webby20 - Thumb 2.0 list - About
Webfalls - Useless link sharing - Fun
Web-feeds - Digg videos & links - Video
Webgoggles - Adult search - Porn
Webgui - CMS - Software
Webimager - Capture screens & upload them to Flickr - Images
Webjam - Collect, mix & share content from many sources - Community
Webjay - Playlist community - Audio
Weblo - Play & earn in world game - Game
Weblogistan~ - Tools that add interaction to your blog - Publish
Webmarketing20 - Wiki on marketing 2.0 - Marketing
Webmorizer - Share notes on websites - Office
Webmunism - Search media & knowledge in self-organizing categories - Search
Webnote - Make & share notes - Office
Weborb - Build, deploy & host rich client apps - Software
Webosphere - 2.0 blog - About
Webride - Add forum to any web page - Communicate
Webringr - Create, send, manage & share links - Bookmark
Webripper - Rip files from sites - Software
Webshots - Upload, share & print photos - Images
Websitesasgraphs - Show your links as a graph - Images
Websitewatcher - Monitor sites for updates and changes - Software
Websnext - Slideshow of Web 2.0 sites - About
Webtop - Social desktop - OS
Webtwopointoh - Create your own 2.0 company - Fun
Webwag - Customize your start page - Portal
Wecheese - Proximity based dating - Date
Weebly - Free web creation tools - Software
Weedshare - Play, buy, share & sell music - Ecommerce
Weekendr - Plan & share weekend activities - Community
Weeworld - Create your avatar & share it everywhere - Community
Wehow - Profile & share your expertise - Knowledge
Wereldkenner~ - Wikipedia & Google Earth mash-up - Geo
Wesabe - Help each other to get the most from your money - Community
Wesmirch - Automated gossip aggregator - News
Wetpaint - Create, contribute & connect - Publish
Whabam - Search, buy & sell - Ecommerce
Whatsbuzzing - Search, browse & discover products with a buzz - Ecommerce
Whatshouldireadnext - Share your bookshelve - List
Whatsweb20 - Shortest list of Web 2.0 companies - About
Where - Upload & share photos on community walls & maps - Community
Whirlpad - Publish & share travel journals - Publish
Whobar - Sign on software - Identity
Who-isit - Whois, ping, check link popularity - Search
Wholinked - Look up who's linking to your site - Stats
Whonu - Discover/search content (more) intuitively - Search
Whototalkto - Job referral exchange - Employment
Whowouldbuythat - Anti-ecommerce - Ecommerce
Whyrobbierocks~** - Style your avatar & travel with it around the world wide web - Community
Widgetbox - Directory for web widgets - Search
Widgetoko - Aggregates social widgets - About
Widgipedia - Digg widgets - Dig
Widsets - Create mobile widgets - Software
Wiffiti* - Text your message to public screens - Communicate
Wifitastic - Set up a commercial wi-fi hotspot - Wi-fi
Wikiafterdark - Create, edit and learn from adult how to articles - Porn
Wikibios* - Let your friends collaborate on your bio - Publish
Wikicalc - Collaborate on data sheets - Office
Wikicompany - Social business directory - Marketing
Wikihow - Collaborate on collection of how-to manuals - Collaborate
Wikimatrix - Compare wikis - About
Wikinancial - Read & share knowledge on stock trading - Finance
Wikio - User managed news search - News
Wikipedia* - Read & co-edit encyclopedia - Publish
Wikipediamobile - Wap version of Wikipedia (by Sevenval) - Publish
Wikispaces - Collaborative content & editing - Publish
Wikitravel - Read & co-edit travel guide - Publish
Wikology - Business directory wiki - Ecommerce
Wildapricot - CMS with lots of 2.0 for not-for-profit clubs etc. - Software
Windowslocallive - Race your own street - Game
Wink - Folksonomied search - Search
Winksite - Create & share mobile content - Multimedia
Wirefan - Social bookmarking & discovery - Bookmark
Wisdomark - Collaborate on publishing & sharing stories - Publish
Wisdomdb - Rate & share solutions to problems - Knowledge
Wishlistr - Create & share wishlists - List
Wishood - Create & share wish lists - List
Wists - Share shopping lists - Ecommerce
Wizag (a.k.a. Diggol) - Track your news & blogs on your own news page - News
Wize - Product review aggregator - Ecommerce
Wizlite - Highlight & share text on any web page - Office
Wobblog - Rank & share blog postings - Rate
Woeba - How to Web 2.0 list - About
Wondir - Share Q&A - Knowledge
Woolygans - Street culture community - Community
Woomp - Upload & share art, photos & video - Multimedia
Woomu - Submit, vote for & rank videos - Video
Wordcast - Host, manage, measure & monetize podcasting - Software
Wordie - Publish and share (lists of) words - Vocabulary
Wordnews - News tagged in Times - News
Wordofblog - Spread the word for good causes - Marketing
Work - Publish & share articles on SME business - Knowledge
Workcircle - Find recruiters or jobs - Employment
Workday - web-based ERP solutions - Software
Workfriendly - Make surfing look like working in Word - Fun
Workmagnet - Search, find & apply for jobs, or recruit - Employment
World66 - Read & co-edit travel guide - Publish
Wridea - Store ideas, manage projects - Organize
Wrike - Plan & organize projects - Organize
Writeboard* - Write, share, revise & compare documents - Office
Writely - Store, edit & share documents - Office
Writetomyblog - Multi blog word processor - Publish
Wsfinder - Search APIs and web services - About
Wufoo - Build & host forms - Design
Wuraweb - Find local prices & credentials - Ecommerce
Wwwhatsnew - 2.0 blog - About
Wyacracker - Build your own widgets - Software

XXX
Xanco~ - Mobile phlog & vlog - Publish
Xanga - Blog rings - Community
Xboxkicks - Digg Xbox news - Dig
Xcavator - Search & sort images - Search
Xcellery - Online spreadsheet - Office
Xdrive - Store & share your data - Store
Xfruits* - Mix, make & share feeds - RSS
Xilinus - Social bookmarking - Bookmark
Xin - Online OS for Ajax serverapps - OS
Xing** - Community for entrepreneurs & professionals - Community
Xmailharddrive - Store data thru Gmail - Store
Xmetal - XML authoring suite with 6 applications - Software
Xmlhttprequest - Track Web 2.0 news - News
X-moment*~ - Publish an event at a location - Geo
Xtube - Upload & share your porn - Porn
Xuqa - Publish yourself & connect to anyone - Community

YYY
Yackpack - Group voicemail - Communicate
Yadis - Foundation for URL-based identity management - Identity
Yahooanswers - Share Q&A - Knowledge
Yahoodevelopernetwork - Javascript developer center - Software
Yahoomaps* - Global & local maps & search mash-ups - Geo
Yahoomyweb2 - Social bookmarking - Bookmark
Yahootagsoup - News tag cloud; news mash-up - News
Yahoovideo - Submit & share videos - Video
Yakalike - Chat while you surf websites - Communicate
Yardbarker - Digg sports news - Dig
Yashi - Upload & share video(Merged with Bolt) - Video
Yawords - Buy a search term, eternally - Marketing
Yay2dot0logoparody - Traditional brands in 2.0 design style - Fun
Yazai - Sell your content - Multimedia
Yellowbook - Yellow pages aggregator - Search
Yellowikis - Social business directory - Marketing
Yelloyello~ - Review & rate companies in directory guide (mash-up) - Rate
Yelp - Find, review & discuss local restaurants etc - Ecommerce
Yesnomayb - Find, get introduced to & date with people with same tastes - Date
Yfly - Meet celebrities, share content - Community
Yigg - Digg, too (DE) - News
Yiibu - Remix, adapt, expand, share & sell content - Multimedia
Yodlee - Bank, pay, manage your wealth & risk - Finance
Yodpod - Feed reader - RSS
Yokel - Find best prices for products near you - Ecommerce
Yoono - Search, exchange & share information - Search
Yoople - Search & collaborate on improving search results - Search
Yoosi - Create your personal start page - Portal
Yorz - Join group, upload resume - Employment
Yotophoto - Publish & sell photos - Images
Youaretheguest - Invite yourself to a talkradio podcast show - Audio
Youhavebo - Anti-social software - Fun
Youmail - Record unique voice mail recordings for anyone that calls you - Communicate
Youmeus - Relationship advice community - Date
Youos - OS in your browser; standard apps + develop yourself - OS
Youpickthenews - Digg news - Dig
Youporn - Upload (not really…) & share lousy porn videos - Porn
Yourdraft~ - Create & share drafts - Office
Yourep - Store, organize & share your photos - Images
Yourgmap - Map & publish your places - Geo
Yourminis - Goowy without the news -> personalized services portal - Portal
Yournextdrink - Publish, vote for & share drink recipes - Community
Yourspins - Remix, publish & share tracks legally - Audio
Yousendit - Email large files - Communicate
Youshouldmeet - Refer your friends to friends - Office
Youtorials - Collaborate on tutorials - Knowledge
Youtube* - Upload & share video - Video
Yub - Meet, hang & get discounts in shopping mall - Ecommerce
Yubnub* - Search & share search commands - Search
Yugma - Free web conferencing - Communicate
Yuku - Share your profiles
Yutter - RSS feed2email subscription - RSS
Ywoosh~ - Find or sell houses - Ecommerce

ZZZ
Zaadz~ - Network of inspired people - Community
Zackbookmaps - Locate & lend books (map mash-up) - Economy
Zamily - Connect & share with your family - Community
Zamzar* - Convert your files online - Software
Zapr - Upload & share your files - Multimedia
Zaptxt - RSS to email, sms, messenger - RSS
Zapzap - Digg podcasts - Dig
Zattoo - TV over IP (CH only) - Video
Zazzle - Design, sell & buy custom goods - Ecommerce
Zcubes - Os in your browser - OS
Zebo - List & share what you own & what you want - Ecommerce
Zecco~ - Trade stocks for free - Finance
Zeedex - Search with suggestions - Search
Zeedive - Dutch auction - Ecommerce
Zeemaps - Create & share maps of/with friends & family - Geo
Zemble - Communicate, collaborate & connect thru group text - Communicate
Zenfolio - Host photo gallaries - Images
Zestr - Catalog all your media online - List
Zexsports - Networking for extreme sports lovers - Community
Ziblit - Recommend businesses to other consumers - List
Ziddio - Upload, rate & share videos - Video
Ziggs - Index of professionals - Community
Zigtag - Search, save & share results - Search
Ziki - People matching thru tagged interests - Community
Zillow - Get your home valuated (map mash-up) - Ecommerce
Zilzle - Profile yourself & your friends - Identity
Zimbio - User generated network of public portals - Portal
Zimbra - Work & communicate together - Organize
Zingku - Text2website content sharing - Community
Zipcar - Share your car - Economy
Zipingo - Find local business based on community input - Ecommerce
Zippyvideos - Upload & share video - Video
Zirrus - Ajaxified, tagged to do tool - Office
Ziwiki - Create & share your wiki - Publish
Zixxo - Create & distribute online coupons - Ecommerce
Zlango - Icon language for sms - Communicate
Zlio - Social commerce - Ecommerce
Zogix - Innovators' community - Knowledge
Zohochallenge - Collective polling - Survey
Zohochat - Create your own chat room - Communicate
Zohocreator - Create & share applications - Software
Zohocrm - Web-based crm - CRM
Zohoplanner - Create & share memos & notes online - Office
Zohopolls - Create, share & vote - Survey
Zohoshow - Create, edit & publish presentations online - Office
Zohovirtualoffice - Online office suite - Office
Zohowriter - Online word processor - Office
Zoints - Publish & share your content, and meet - Community
Zonetag - Get tag suggestions for your photos - Images
Zoodango - Have a coffee with other professionals - Community
Zookoda - Promote your blog with email marketing - Marketing
Zoom~ - Upload & share photos - Images
Zoomblast - Upload, rate & share videos - Video
Zoomclouds - Make & publish tag clouds - Tag
Zoomf - Search with map mash-up - Search
Zoominfo* - Search persons; create your own page - Community
Zoomshare - Free website community - Store
Zoomtags - Tag cloud based affiliate network - Marketing
Zooof* - Discover, maintain & extend your family ties - Community
Zooomr~ - Find photos & make friends in many languages - Community
Zoozio - Personal homepage - Portal
Zopa - P2P banking services - Economy
Zopto - Add your stuff to & share places - Community
Zorpia - Upload & share photos - Images
Zoto - Upload, phlog & share - Images
Zshare - Host & share your media - Multimedia
Zuggest - Search Amazon as you type - Search
Zunafish - Buy & sell old media items - Ecommerce
Zurpy - Save & organize bookmarks - Bookmark
Zuzu~ - Keep track of your friends' birthdays etc. - Office
Zvents - Organize & manage events - Office
Zweitgeist - Meet & communicate with people on websites - Communicate
Zyb - Store, manage & share your cell's data - Store
Zypsy - Post & get matches for classified ads thru cell & email - Marketing

Update 070127.

Update 070128 - The following websites were or appeared to be dead or defunct today, so I deleted them from the list above:

Talkdiggeralpha* - Semantic tools to find, follow & join web conversations - Community
Ticklr - Store, share & tag legal bookmarks - Bookmark
Venturfundr - Online self-serve Venture firm - Finance
Vpodtv - Create & share your (mobile) tv channel - Video
Webcollaborator - Collaborate online - Organize
Weblogwire - Connect bloggers to PR world - News
Wideword - Create & share documents online - Office
Xista - Get more info searching - Search
Xposted - Buy & sell your content - Multimedia
Yummy - Store, share & tag pdf files - Bookmark
Yurnet - Übersearch - Search
Zero-zero - Meta mash-up for soccer news - News
Zingee - Store & share files (now www.zapr.net) - Store

Q - S; Update

QQQ
Qelly - Meta search engine - Search
Qipit - Capture it, submit it, get back a pdf & share it - Office
Qlock - Time mash-up - Organize
Qloud - Social music search & buy service - Ecommerce
Qnalive - Microsoft's Q&A - Knowledge
Qoogle - Video search - Search
Qoolsqool - Digg school knowledge - Dig
Qoop - Publish & sell photos & photo products - Ecommerce
Qoosa - Social bookmarking - Bookmark
Qooxdoo - Javascript GUI toolkit - Software
Q-phrase - Search solutions (clients) - Search
Qtsaver - Micro content search; Google & Yahoo mash-ups - Search
Qtsearch - Search for content in Yahoo & Google - Search
Quadriot - Digg strange news - Dig
Qube - Search engine aggregator (client) - Search
Qucikbrowse - Combine your favorite pages in 1 email - Portal
Quece - Conversational search - Search
Queeky* - Make drawings online & share them - Images
Queoo - RSS to email, messenger - RSS
Questionform - Create, publish & analyse surveys - Survey
Questionize - Q&A - Knowledge
Questionville - Q&A - Knowledge
Questsin - Collaborate on dictionary - Publish
Quickbase - Project management solution - Organize
Quickcamp - Organize your projects - Organize
Quickmail - Email2RSS - Communicate
Quickmuse - Battle of the poets - Vocubalary
Quicktoons - Create & share comics - Publish
Quicktopic - Group message board - Communicate
Quimble - Create, vote for & search polls - Survey
Quintura - Search engine with visualized context terms (client) - Search
Quizilla - Create & share content - Multimedia
Qumana - Edit your blog - Publish
Qunu - Get or offer help - Economy
Quomon - Q&A for IT issues - Knowledge
Qvey - Create & pay or participate & get paid for surveys - Survey
Qwer - List & share your things to do - List
Qwerky - Search strange site names - Search
Qwika - Search wikis - Search
Qype - Find & recommend best spots in town - Collaborate

RRR
Rabble - Create it & share it mobile - Community
Radar - Upload & share photos & videos - Multimedia
Radeo - Compile & share playlists - Audio
Radioblogclub - List & save your favorite tracks - Audio
Radiohandi - Group chat - Communicate
Radiotaleripple - Analyse your podcast's stats - Software
Radiotime - Personalize radio - Audio
Radiusim - Location enhanced messenger service - Communicate
Radrails - Develop Ruby on Rails apps - Software
Railsbase - Application hosring (Ruby-based) - Store
Raisingthem - Publish & share parenting tips - Community
Rallypoint - Share knowledge - Knowledge
Rapidfeeds - Publish feeds without tech know-how - RSS
Rapidobject** - Create, print, sell & buy 3D objects - Personal manufacturing
Rapleaf* - Manage your reputation & rate your friends - Identity
Rasasa~ - RSS-based news alert service - News
Rasterbator - Creates rasterized images - Design
Rateitall - Rate & share opinions on everything - Survey
Rateordate* - Crowd match, singles event maps, online dating - Date
Rawsugar - Social bookmarking directory & revenue sharing - Economy
Razz - Record & load up audio to your blog - Audio
Rbloc - Sell, buy & meet auction market place - Marketing
RDFcalendar - Meta calendar - Office
Reader2 - List, review & discuss books - List
Readio - Blog2podcast - Audio
Readitswapit - Swap books - Economy
Readspeaker - Text2speech app (Spanish) - Communicate
Readwriteweb - Reviews Web 2.0 things - About
Realtimematrix - Solution to personalize your content for any device - Software
Reblogger* - Collect, filter, sort, index & publish feeds - RSS
Rebtel* - Call international at local rates - using your cell phone - Communicate
Recipething - Organize & share your recipes - List
Recommendit - Social bookmarking - Bookmark
Recruiterredbook - Find the right recruiter - Employment
Redbet - Betting exchange - Gamble
Reddit - Digg news - Dig
Redditnsfw - Bookmark, rank & share porn links - Porn
Redfin - Find housing (map mash-up) - Geo
Redlettr - Tag & comment the bible - Collaborate
Redlightcenter - 3D adult community - Community
Redrockbay - Customize your news - News
Redswoosh - Upload & share video, audio & other big files - Multimedia
Redtoucan - Share photos & review products - Ecommerce
Reevoo - Review & buy electronics - Ecommerce
Referralmonitor - Manage word-of-mouth marketing - Marketing
Refilter - Filter your feeds - RSS
Regger - Datamine your blog - Dbase
Rel8r - Tag, read, search blogs - Collaborate
Relate-a-zon - Pathfinder game (mash-up with Amazon) - Game
Relatime - Present & share ideas about time - Office
Relenta - CRM tool set - CRM
Releton - Google + Yahoo + maps & routes - Search
Relevantview - Captures behavior & opinions - Survey
Relishio - Digg news - Dig
Reminderfeed - Send reminders to your feed reader - Office
Remix - Remix & share videos - Video
Remotecontrolmail* - Go thru your snail mail digitally before you receive it - VAS
Renkoo - Arrange when & where to meet your friends - Community
Rentmeavacation - Share your vacation homes - Ecommerce
Rentxista - Rent a page - Marketing
Reply - Get info on value of homes & cars in USA - Search
Reputata - Manage your reputation (stealth) - Identity
Reputationdefender - Have all negative things about yourself destroyed online - Identity
Reputator~ - Manage your reputation online - Employment
Resellular - Get out of your cell contract, or take over a contract - Economy
Resizr - Resize images online - Images
Resultr - Meta search with agents - Search
Retrevo - Meta product search - Search
Retrievr* - Search images by sketching - Search
Reviewme - Pay or get paid to review web sites - Publish
Revision3 - TV network for the web - Video
Revver - Upload, share or sell your videos - Ecommerce
Rhapsody - Listen to free music, share playlists - Audio
Riffs - Recommend, chat & share - Knowledge
Rightcart - Sell your own or 3d parties' stuff on your site - Ecommerce
Ripple - Be your own banker - Finance
Riya* - Face recognition based photo search - Search
Rminder - Text2phone reminder service - Office
Rmxdirect - Auction your ad inventory - Marketing
Robinfood - Subscribe to gameshow, donate; if you win spend 1 million on good causes - Game
Rocketboom - View & contribute to daily vlog - Video
Rockyou - Publish & share photos - Images
Rojo - Discover, organize, read & share content - News
Rollyo* - Create search agents - Search
Root* - Trading platform for realtime consumer data - Marketing
Rootly - Refine your news search - Search
Rootvaults* - Store, manage & share knowledge online - Knowledge
Roughunderbelly - Score points on completion of your tasks - Organize
Roundcube - Webmail - Communicate
Roundedcornr - Generate & share code for rounded corners - Fun
Routecraft~ - Route planner; add your text to locations & share it; also for mobile - Geo
Roxio - Try out free media apps - Software
Roxomatic - Social bookmarking review - About
RR-JJ - Publish & share quotes - Office
Rrove* - Save & share places - Collaborate
RSS2PDF - Convert feeds to PDF - RSS
RSSbandit - Feed reader - RSS
RSSbus - Connect & share your data thru feeds - RSS
RSScalendar - Manage & share your calendar - Office
RSSfwd - RSS to email - RSS
RSShut - Read & search feeds - RSS
RSSmad - Feed reader & archive - RSS
RSSmicro - Feed search - Search
RSSor - Collect, read & share feeds - RSS
RSSreader - Feed reader - RSS
RSSweather - Weather feeds - News
Rubyonrails* - Web development framework - Software
Runfatboy - Manage your diet & fitness - VAS

SSS
Sabifoo - Read & publish news through messenger - News
Sabrosus - Store & share bookmarks - Bookmark
Safariu - Create, publish & share science materials - Publish
Safemail* - Create an uncrawlable image of your email address - Software
Saki - Mobile community - Community
Salaryscout - Share salary info & discover your true value - Employment
Salesgenius - Track your prospect's behavior online - Marketing
Sameplace - Chat while you surf - Communicate
Sametalk - Chat with other site visitors - Communicate
Sampa - Build a website - Software
Sanebull - Customizable start page for stock information - Finance
Saulweiner - Meta Web 2.0 list - About
Savedsearchpro - Find Ebay deals easier - Ecommerce
Savemyass - Send your wife flowers frequently - Ecommerce
Savemyporn - Adult search - Porn
Savetoby - Donate or else… - Economy
Sawlogs - Publish & share your dreams - Publish
Sayoutloud - Post questions & issues, get answers or reactions - Knowledge
Say-so - Share problems & get advise - Collaborate
Sayswap - Game trading community - Community
Scatterchat - Secure IM for activists & dissidents - Communicate
Schoolbank~ - Profile yourself & find back class mates - Community
Schooltool - School calendar & info system - Software
Schoopy - Classroom organizer & site hosting - Software
Schtuff - Wiki service - Publish
Scooch - Create & share slide shows - Images
Scooop - Digg news (scoops) - Dig
Scoopgo~ - Create & maintain news search agents - Search
Scoopity - Digg gossip - Dig
Scooplive - Sell your scoops live - News
Scoopt - Upload & sell news photos - Images
Scrapblog - Scrap, blog & share - Software
Scratchlist - Social bookmarking, partly automated - Bookmark
Scratchnscribble - Mail real handwritten postcards - Communicate
Scribefire (formerly: Performancing) - Blog metrics - Stats
Scriptaculous - Javascript libraries 2.0 style - Software
Scriptmimic - Find or publish & share scripts - Software
Scroogle - Google without ads & other evil - Search
Scrybe - Share calendar, lists etc - Office
Scuttle - Social bookmarking - Bookmark
Searchfox - Social bookmarking - Bookmark
Searchinsidethemusic - Search music by content and context (stealth) - Audio
Searchles - Submit, tag & share sites - Bookmark
Searchmapr - Cluster your search results in treemap - Search
Searchmash - Ajaxified search playground for Google - Search
Secondlifeboutique - Buy real things with virtuaa money - Economy
Seconds11 - Promote (11 seconds) of your podcasts - Audio
Secondsite - Web-based invoicing - Finance
Seedwiki - Create wikis & blogs - Publish
Seekum - User ranked search results - Search
Selectminds - Facebook & collaboration tools for staff and alumni - Collaborate
Selectrecruiters - Find the right recruiter - Employment
Selfcast - Upload, watch & share vids - Video
Sellaband~ - Promote your music & find 5000 fans - Economy
Selsius - Real estate community - Community
Semantical - Sementic search engine software - Search
Semanticthoughts - Get all 2.0 lists in OPML - About
Semapedia** - Add wikipedia tags to real world things - Tag
Sendspace - Email large files - Communicate
Serversidewiki - Mini-wiki - Publish
Sevenload*** - Upload & share photos & videos - Multimedia
Sexbyrss - Personalized porn thru rss - Porn
Sexycanvas~ - View & purchase erotic art (Browse through tastefully decorated rooms or upload an image of your own room to experience the works in various settings). - Ecommerce
Sf0 - Collaborative production game & community - Game
Sfzero - Build your character by completing group tasks - Game
Shadows - Social bookmarking - Bookmark
Shakkus - Bookmark, rank & share entertainment news - News
Shamblesweb2 - Categorized 2.0 list - About
Sharecare~ - Organize yourselves in groups to share care - Community
Sharepointkicks - Digg Sharepoint news - Dig
Shareyourlook - Community for fashion addicts - Community
Shareyouropml - Share outlines, feed & taxonomy - Knowledge
Sharingpoint - Publish, link to & share health information - Publish
Sharkle - Watch, vote for & share videos - Video
Sharpcast - Synchronize all photos online & mobile - Images
Shazam - Have music recognized thru your cell - Audio
Shelfari - Show, review, share your books - Community
Shinyletter - Mail2snailmail - Communicate
Shooshare - Upload & share your porn - Porn
Shooter7 - Send photos, videos, music (app) - Multimedia
Shoposphere* - Create & share pick lists - Ecommerce
Shopwiki - Search 120,000 stores - Search
Shorttext - Create & share URL's to text notes - Office
Shoutcentral - Publish yourself & chat while you surf - Community
Shoutfit - Share trends & friends - Community
Shoutwire - Digg news - Dig
Showbloggers - Digg tv shows - Dig
Shozu - Upload & share photos, videos & text on your mobile - Multimedia
Shutterbook - Store & share photos - Images
Shutterfly - Store, share & print photos - Images
Shutterseek - Digg photography news - Dig
Shuzak - Community for geeks (with Digg-like features) - Community
Sidejobtrack - Job tracker - Employment
Sidekiq* - Hyper meta search - Search
Sideklick - Get contextually relevant video suggestions added to your IM - Communicate
Sideload - Share free music files - Audio
Sidenotes - Make & share notes on web pages - Office
Sidewalk - Create Ajax forms - Software
Sightspeed - Voice & video over IP - Communicate
Simile - Interoperates metadata in unlike environments - Bookmark
Simile - Semantic interoperability of metadata and information tools - Software
Similicious - Search for similar websites - Search
Simplelog - Blog application - Software
Simpleseating - Seating tool - Software
Simpleticket - Helpdesk solution - CRM
Simplifid - Zap from identity to identity online - Identity
Simplybill - Invoice management - Finance
Simplygoogle - Everything Google on 1 page - Search
Simplyhired - Local job search - Employment
Simpy - Social bookmarking, tagging & search - Bookmark
Singlesearch - Two way matchmaking - Date
Singlestatus - Myspace alert mash-up on member status - Community
Singshot - Record & share your own songs - Audio
Sitebar - Social bookmarking - Bookmark
Siteblimp - Promote your online identity thru search - Identity
Siteflavoredgoogle* - Tailor adwords to your site - Ecommerce
Sitejot - Social bookmarking - Bookmark
Sitekreator* - Build, publish & host websites - Software
Sitemeter - Web stats - Stats
Sitepal* - Design speaking animated avatars - Communicate
Siteshuffle - Make a slideshow from your favourite websites - Portal
Sitetagger - Social bookmarking - Bookmark
Sitevista - Test your website - Software
Sizeasy - Compare sizes of online goods with everyday items - Ecommerce
Skeletonz - CMS solution - Publish
Sketchup - Create & view things in 3D - Design
Skibonk - Ski resorts (map mash-up) - Geo
Skillmeter - Identify, measure & retain talents thru assessments - Employment
Skillsfeed - Share knowledge - Knowledge
Skillswap - Swap your web design skills - Community
Skimcss - Digg CSS - Dig
Skinnyr - Track your weight - VAS
Skobee - Arrange meetings & events online - Office
Skoeps~ - Citizen journalism based news - News
Skombo - Sell & buy rare music - Ecommerce
Skrbl - Publish & share notes - Office
Skuer - CSS search engine - Search
Sky-click - VoIP call center solution - CRM
Skyhook - Wi-fi positioning - Software
Skylook - Record & store all Skype communications - Communicate
Skype - Call, conference, messenger, file sharing - Communicate
Slashdigg - Slashdot + Digg mash-up - News
Slawesome - Add voice to your email - Communicate
Slide* - Create photo loops & share them on your website - Images
Slidestory - Publish stories with photo slideshows - Images
Slimtimer - Organize your projects - Organize
Slingmedia - Watch tv over ip wherever you are - Video
Slister - Bookmark & list products - Ecommerce
Slurlmaker* - Bookmark sites in Second Life - Bookmark
Slut-o-meter - Calculate your popularity - Identity
Smarkets - Stock markets for products - Economy
Smarking - Social bookmarking - Bookmark
Smartimagine - Store & manage your image & media files - Store
Smartpox - Sema-encode & share URLs, phone numbers & email addresses - Identity
Smashmyviper - Buy pixels to destroy car - Economy
Smblive - Share all business applications - Software
Smikioo - Catch yourself smiling & get comments - Community
Smilebox - Pimp up your photo presentation - Images
Smllr - Tag your Flickr photos with smells - Fun
SMP - Search & save porn - Porn
Smugmug - Store & share photos - Images
Smutvibes - Hook up with hot friends, meet new people (adult stuff) - Community
Snacksby - Tell what you have in your pantry and get a recipe - VAS
Snag - Find friends & get other features from all your networks - Identity
Snaket - Clustered search - Search
Snap - Ajax search, shows found pages - Search
Snapbits - Store, sort & retrieve bits of information - Office
Snapfish - Upload & share photos - Images
Snapjot - Organize & share photos, videos, text & communications - Multimedia
Snapmania - Upload, edit, organize & share photos - Images
Snappages - Publish & share your life with this toolset - Community
Snappreview*** - Offer your site's visitors a preview of any page you link to - Publish
Snapshirts - Get your T-shirt with a tag cloud - Tag
Snaptune - Record music from radio to hard disk - Audio
Snapvine - Send audio files to & communicate with your friends, on your cell - Audio
Snipit - Clip parts of web pages - Bookmark
Snipperoo - Add, remove & manage widgets - Software
Snipplr - Delicious for programmers - Bookmark
Snipshot - Edit pics online (a.k.a. Pixoh) - Design
Snubster - Get rid of your friends - Community
Snunk - Search & vote - Search
Soapboxit - Share reviews on everything & everybody - Community
Soapbx - Present online - Office
Social21 - Be matched & date - Date
Socialbookmarking - Social bookmarking - Bookmark
Socialcircles* - Visualizes relations in an email database - Dbase
Socialcookbook - Post, rate & review recipes - Publish
Socialexplorer - Find out about your neighbours - Community
Socialight - Share pictures & notes with your cell phone - Collaborate
Socializer - Submit social bookmarks at many websites - Bookmark
Social-mail - Email2RSS - Communicate
Socialmarks - Social bookmarking - Bookmark
Socialmeter - Check your 2.0 site's popularity in 2.0-sphere - Survey
Socialpicks - Analyse & recommend stocks with your peers - Finance
Socialporn - Digg links to porn - Porn
Socialtext - Enterprise wiki solutions - Publish
Solomodels - Upload, commicate with, vote for, hire or buy from photographers & models - Ecommerce
Solutionwatch - Reviews & lists of school & study tools - About
Solutionwatch* - Reviews of 2.0 websites - About
Solve360 - Groupware CRM - CRM
Songbird - Media player & web browser - Multimedia
Songbird* - Browse, download, manage & share all media - Browse
Songrio - Digg music tracks - Dig
Sonific - Claim a song & publish it on your site - Audio
Sonr - Track media & media users - Multimedia
Soonr - Mobile2web & v.v. - Communicate
Sorrygottago - Anti-communication software - Fun
Souki~ - Local shop search - Ecommerce
Soulcast - Blog solution - Publish
Soundbite - Submit & share sound bites - Audio
Soundblog - Reviews & lists of sound apps (& other cool stuff) - About
Soundtransit~ - Add your sounds to locations & share them - Audio
Spambob - Disposable email addresses - Communicate
Spankwire - Digg porn - Dig
Sparkhive - Store & share thoughts, research, bookmarks - Knowledge
Speedtest* - Check your ISP's speed - Software
Spellwithflickr - Spell names with photos; Flickr mash-up - Images
Sperocite - Spiritual Digg - Dig
Sphere - Search the blogosphere - Search
Spherexplorer - 3D web browser - Browse
Spicydigits - Manage shared expenses - Finance
Spillr - Q&A - Knowledge
Spinspy - Digg links - Dig
Spinvox - From voice to text to mobile or email - Communicate
Splashblog - Publish & share mobile photos - Images
Splashdata - Mobile tools for media, payments, shopping… - Software
Splice* - Mix, mash-up & share your music - Audio
Splitgames - Trade games (French) - Economy
Spokeo - Aggregate & share your social network profiles & content here - Community
Spongecell - Arrange meetings & events online; with AI - Office
Sponit - Publish & share funny news - News
Spore*** - User generated gameplay & characters - Game
Sportiki - Wiki on sports - Publish
Sportingo - Publish & share sports content - Publish
Sportsblink - Digg sports news - Dig
Sportsmates - Sports bloggers community - Community
Spotback - Customize your news through your clicking behaviour - News
Spotrunner - Recycle, recreate & air tv ads - Marketing
Spotscout - Find or sell parking space - Ecommerce
Spout - Publish & share reviews, buy films - Video
Sprajax - Security for Ajax - Software
Spreadfair - Spread betting exchange - Gamble
Spreadshirt* - Design, buy or sell your T's - Ecommerce
Spresent - Create, edit & share flash presentations - Office
Springdoo - Add your voice to your email - Communicate
Sprinko* - Do & share everything here - Community
Sproose - Personalize search results & share them - Search
Sproutit - Mailroom: process email together - Communicate
Sproutliner - Manage your tasks - Office
Spurl - Bookmarking & search - Bookmark
Spymedia - Publish & sell news photos - Ecommerce
Squadrapiloti - Tell about your car, get matched with other cars - Economy
Squawklive* - Mashes up stock data & news, sends alerts - Finance
Squeet - Get news, blogs, RSS or feeds in your email - News
Squidoo - Share knowledge - Knowledge
Squirl - Organize & share your media collections - List
Squurl - Rapid domain search - Search
SRC - Clustered search - Search
Stabilo-boss - Web 2.0 annotated logo cloud - About
Stalkerati - meta search for people - Search
Standpedia - Publish & share your opinions - Publish
Standpoint - Share & evangelize convictions - Collaborate
Staralicious - Digg (news about) celebrities - Bookmark
Stardoll - Dress up & share your favorite celebrities - Community
Stargazer - Free web-based tools for families & charities - Software
Stars-of-the-Web - Create & publish vids for vlogs - Video
Start - Personal portal - Portal
Start12*~ - Find, compare & review online service providers - Ecommerce
Startaid - Manage & share your (thumb) bookmarks - Bookmark
Starterbase - Create, organize & share data on the web - Office
Startforce - Start page with OS features - OS
Statcounter - Web stats - Stats
Stellent - Enterprise blogging & wiki - Software
Stickam* - Multimedia communication tool - Communicate
Stickis - Publish & share notes on websites - Office
Stikipad - Wiki solution - Publish
Stikkit - Make notes & get alerts - Office
Stockarena - Post on stocks, get graded & make money with it - Community
Stockdigg - Read, submit & rank financial news - News
Stocktickr - Create & share stock watchlists - Finance
Storycode - Read, code, find & share books - Economy
Strategicboard - Share tech news - News
Streamdrive - Upload & share multimedia - Multimedia
Streamick - Co-decide on video streams published - Video
Streamload* - Store & share your media - Multimedia
Streampad - List, listen & share your music (= several mash-ups) - Audio
Streeteasy - Share shopping info - Ecommerce
Stridr - Upload & share or sell music - Audio
Stripgenerator - Create & share comics - Publish
Strmz - Clip & share tv & video - Multimedia
Strongspace - Upload, store, back-up & share your files - Store
Structuredblogging - Create, edit & maintain all posts - Publish
Studicious - Online note taking & sharing - Collaborate
Studybuddy - Share notecards - Office
Stufflinker - Mobile and web bookmarking - Bookmark
Stuffopolis - Keep track of things you lend or borrow - Economy
Stuffspace - List & share what you own & what you want - Ecommerce
Stumbleupon - Social bookmarking (random sharing) - Bookmark
Stylefeeder - Find, share & keep track of cool products - Ecommerce
Stylehive - Get recommendations fitting your product interests - Ecommerce
Subethaedit - Edit & share texts together - Office
Subscribecast - Sell content thru RSS-based subscription format - Ecommerce
Subwaycrush - Dating(?) - Date
Suckingfish - Save, collaborate on & publish search results - Search
Sugar - Ecosystem of Women's communities - Community
Sugarcrm - Open source CRM - CRM
Sugarstats - Manage, monitor & share your blood sugar level - VAS
Suggestica - Get media suggestions from experts - Multimedia
Suitetwo - 2.0 toolset for enterprises - Software
Sundaydash - Find housing (map mash-up) - Geo
Sundera - Collaborate online on spreadsheets - Office
Supcast - Publish your media online thru your cell - Publish
Superoyster - Sell oe buy your place at a waiting list - Economy
Superstart - Personalized shopping portal (Swedish) - Ecommerce
Superviva - Share & get ideas for a better life - Community
Suprcilious - Tag all other tag sites - Tag
Suprglu - Delicious/Flickr/Blogger/etc. mash-up - Portal
Surfninja - Ajax start page - Portal
Surftail - Share your click paths - Bookmark
Surfulater - Collect, save & manage all your info - OS
Surfwax - Multisource search - Search
Sutori - Publish & vote on stories - Publish
Swabba - Online garage sale (German) - Economy
Swagroll - List & share all your media - Multimedia
Swamii - Create cross media search agents - Search
Swapcore - Watch, read & swap it - Multimedia
Swapsimple - Trade your media - Ecommerce
Swaptree - Swap your media - Economy
Swapzies - Store & share or sell multimedia - Multimedia
Swarmofangels - Participate in new cinema - Finance
Swarmsketch - Collective sketching - Images
Swarmteams* - Solutions to set up & manage mobile One2- or Many2Many community communications - Software
Swarmthedotcom* - See how other people browse & chat (Firefox) - Communicate
Swicki - Search with user input - Search
Swift - Safari-like browser for Windows (very alpha) - Browse
Swik - Search for open source software - Software
Switchdiscs - Trade media online - Ecommerce
Swivel - Publish & share data - Data
Swoogle - Semantic web search engine - Search
Swoot**~ - Build your own browser - Browse
Sxc - Upload & share or browse stock photos - Images
Sxip - Control personal digital identity - Identity
Sxipper* - Wand service (with OpenID; Firefox only) - Identity
Sxore - Manage your online reputation - Identity
Synapselife - Customizable 2.0 services portal - Portal
Sync~ - Customize your info on special interests - News
Sync2it - Social bookmarking - Bookmark
Synchroedit - Group editor - Publish
Syncnotes - Create & share notes - Office
Syncone - Social bookmarking - Bookmark
Synthasite - Collaborate on site development - Software
Sys-con - Multimedia magazine - About
Systemone - Enterprise knowledge sharing & management - Knowledge

Update 070127.