He quotes my ‘boss’, Greg Whitby, and a host of other good people. I particularly agree with John’s high estimation of the work of Paul Anderson on behalf of the JISC: “What is Web 2.0: Ideas, Technologies and Implications for Education.”
Get yourself a copy. It is a very comprehensive examination of Web 2.0 indeed! I have it sitting on my desk at work, and have been dipping into it with great enthusiasm.