Inspiration: 5000 logo’s in 333 seconds.
For inspirational (or brainwashing) purposes only!
Not all but many of these are (can or will be) called web 2.0 why?
Look for; Lots of crazy names, the missing letter "e" (Flickr,Tumblr, etc), the shiny table effect, mirror effectt, badges, stickers and plenty of bright colors.
Don't forget to randomly press pause once in a while.