I found this MASSIVE collage of Web 2.0 logos by AJ Batac
Certainly beats trawling through go2web20.net (as good a site as that is, it just takes too long!!)
He has made all the logos available on t-shirts and other apparel:
(click to view full image)
You know all those cool "loading" icons displayed on web 2.0 apps these days, while various AJAX calls go off and do their thing?
Well this site now lets you create them, painlessly, for free!
Here are a few that I created: