link to the post with discussion started by Robert Scoble arising from Google's real-name policy, which started a long conversation, pro and con, about the use of names on tinternet
Excellent piece pulling together theories, making them understandable and relating them to current practice and people. Possibly only missing Lave's concept of peripheral participation and community of practice. I have always assumed an affinity between the idea of a journey from periphery to centre of a community of practice and that journey across a ZPD