http://www.oreillynet.com/pub/a/oreilly/tim/news/2005/09/30/what-is-web-20.html?page=1

Web 2.0: A Visual Explanation
Video -- Jutecht: Screencasts for educators and videos from students.

http://www.youtube.com/watch?v=nsa5ZTRJQ5w

Web 2.0: What Is It Really?
Article -- An overview of the change by Sean Carton of The Clickz Network.

http://www.clickz.com/showPage.html?page=3625146

Web 2.0 Explained
Video -- Michael Wesch, Assistant Professor of Cultural Anthropology, Kansas State University

http://www.youtube.com/watch?v=NLlGopyXT_g