evan told me about this site:http://www.ohloh.net/
I'm totally addicted. In a nutshell, it:
- is a social networking site, where both hackers and open source projects are nodes
- it pulls/polls/analyzes projects' cvs/svn/git repos, showing useful stats about them
- tracks connections between people and projects (what's your committer username for each project)
- tracks which projects people use (your "stack")
- lets people give each other props ("kudos")
- is super ajax-y, taggy, web 2.0-y
- is wiki-like, in that everybody can edit just about anything
- lets you do reviews
- .....
- so much more
Probably a bit niche, but if you use or contribute to open source, I recommend it.... quite fun.