Somebody's probably posted about this (sorry if I missed it) but I just discovered Flock, the social web browser. Follow that link to take a look and download a copy. It is promoted as "a web browser that specializes in providing social networking and other Web 2.0 features built into its interface. The browser is built on Mozilla's Firefox codebase." Looks really interesting and worth checking out.
Gee Whiz! This thing is sweet! With cherries on the top...