TAG 2.0 - Update

Quite some Web 2.0 websites seem to abuse tagging to get rid of their responsibility to design a decent navigation. Some pure tagging concepts in this list; so much more to do in this category...

30daytags - Fresh tagclouds
97tags - Own a tag exclusively
Cloudalicious - Follow site's tags over time
Extispicioustext - Delicious users' tag clouds
Googlecloud - Add your search terms to these clouds
Groopus - Visualize your social context based on tags
Keyworddensitychecker - Visualizes keywords (metatags) in clouds
Mytago - Semacodes to connect offline & online worlds
Neato - Tagging plug-in for Wordpress
Semapedia** - Add wikipedia tags to real world things
Snapshirts - Get your T-shirt with a tag cloud
Suprcilious - Tag all other tag sites
Tag2find - Tag & find everything on your hard disk
Tagcloud - Folksonomied, personalized tag clouds
Tagcrowd - Processes frequency based "tag" cloud from any text file
Tagfacts - Tag & share your notes
Taglocity - Add tags to all Outlook files
Tagsy - Social bookmarking & feed management
Tagthenet - Text2Tags
Zoomclouds - Make & publish tag clouds

Italic = new. Update 061224, 070119, 070303, 070517 (corrected 070527).