I recently interviewed Fred Krueger, CEO of the startup TagWorld. He's launching a community site to compete with MySpace. While the site will live or die based on its success in aping the MySpace business model, more interesting to me is the tag-centric model of TagWorld. The site allows users to tag any content -- photos, bookmarks, blog entries, etc. -- and then organize their activities on the site around those tags. It even works as a tag-based social network. I think it's a fascinating concept, and I wrote a Rafe's Radar column about the company for Release 1.0.
Good news: My Release 1.0 columns are no longer behind a registration wall!