An Autopsy of a Dead Social Network: analyzing the collapse of Friendster. (Summary; full paper available at arXiv.)
Virtual Friendship and the New Narcissism. Examining the social rules and norms, as well as the pitfalls, of electronic "friending" (yes, it's a verb now - or is it a gerund?). Via.
Rebirth of the Semantic Web. On the heels of the Technorati taggregator, the Oddiophile bookmarklet, the tag search (new today!) and much ensuing buzz, Jeff Jarvis brings up people tagging. This concept drove Friendster and FOAF, both of which petered out. But with Technorati's elegant synthesis of photo, link, and post tagging, the web may once again tap into networked individualism.