I saw this online domain generator that says it can generate web2.0 domain names.

http://andrewwooldridge.com/myapps/webtwopointoh.html

If you don't like the domain name then you can refresh the page and it will generate another one for you. Also all the names it generates are not surely available so please make a list of the names you like and then check them all later for availibility if you want to register some of them.