There's a lot to be said about Web 2.0, and I've commented on this elsewhere at length. So, rather than begin a whole new hub, I'd kindly ask that you follow the link above and read what I have there provided.

I don't consider myself as having provided the "final word" on Web 2.0, but I do think of myself as a careful and observant student of the field. I'll let you be the judge.