I was a bit dismayed when I checked the latest version of the Wikipedia page for Web 2.0 and saw this super-snarky intro paragraph:
Obviously the Wikipedia editors aren't keeping a close enough eye on the Web 2.0 page. That kind of dreary cynicism is not what I'd lead a definition page with! But I guess that paragraph is a sign of the times, when skepticism outweighs positivity. Having said that, it's interesting to watch the Web 2.0 Wikipedia page because of that. It evolves in line with popular opinion.
There is a cool new graphic on the page though: