DATA 2.0: 55 ways to manage & visualise databases or to track, analyse, optimise & report statistics on blog traffic, business intelligence etc

Since databasing is one of the most important niches in the software market, it's surprising how few pure online database solutions I've found so far. To compensate this a bit, I've added my findings on treemaps - an attractive trick to present complicated data in one view.
More interesting things regarding the presentation of complex data, of course, are going on in all kinds of mash-ups... See e.g. ECOMMERCE 2.0 and GEO 2.0.

This category also includes my former STATS 2.0 entries. Web sites in this category help you to track, trace, analyse, optimise & report on the usage of your web page, sometimes coming close to the best features in business intelligence solutions.

8 additions in this update, in italic.

Blogbeat - Compare websites' Alexa rankings (formerly known as Alexaholic)
Blogscope - Blog analytics software
Caspio - Create dbase apps without programming
Caspioe - Organize & manage your data
Clearforestsws - Semantictextanalysis2XML
Clicktale - Analyse blog traffic
Crazyegg - Watch users' click paths as a movie
Data360 - Find, present & share data
Datamashups - Create mash-ups & apps
Delexa - Test effectiveness of your website
Delineate - Ranks top websites with Delicious tags & Alexa data
Eunifydb - Organize & manage your data
Flexdirectory - List people, groups, jobs
Flickrgraph** - Visualize your network on Flickr
Freebase - Organize & manage your data
Googleanalytics - Folksonomied visitor stats
Googletrends - Site analytics software
Hivegroup - Treemap specialist
HivePM - Treemap for product management
HivePPM - Treemap for purchasing performance management
HiveSM - Treemap for sales management
Honeycomnewsmap* - News treemap
IP2location - Create trend charts for site traffic
Itunestreemap - Track the iTunes Top 100 songs as they move up and down the charts
Kowari - Store, retrieve or analyse metadata
Lazybase - Create, manage & share databases
Livepagerank - Track your site visitors geographically
Mapstats - Check your PR
Mapsurface - Map blog traffic
Measuremap - Web stats
Merit - Treemap for Marine Corps Equipment Readiness Information Tool
Mint - Blog stats
Moodviews~ - Site analytics software
Mybloglog - Stats for LiveJournal moods
Myowndb - Organize & manage your data
Mywebdb - Organize & manage your data
Peetscom - Treemap product comparison
Perspectives** - Visualizes spatio-temporaly the places we inhabit
Popuri - Check popularity of any site
Powehousemuseum - Contribute to museum object folksonomy
Regger - Datamine your blog
Robotreplay - Record & watch your website visitors in action
Scribefire (formerly: Performancing) - Blog analytics
Sitemeter - Blog metrics
Socialcircles* - Visualizes relations in an email database
Statcounter - Web stats
Statsaholic - Create & share applications
Swivel - Publish & share data
Teamdesk - Organize & manage your data
Touchgraph* - Visualize online data
Trackvia - Organize & manage your data
Trendalicious - Web stats
Turbodbadmin - Online dbase in Ajax
Urinfo - Real time website popularity trends
Wholinked - Pagerank tool

Italic = new. Updated 061221, 070119, 070303, 070517, 070829.