I think I previously mentioned the Ohloh website, which tracks SVN
statistics (e.g., number of blank lines, comments, etc.)
They recently added “location” and a map for users and developers.
Basically, you sign up, claim contibutions in projects you contribute
to, and set a location using Google Maps.
I think it’s fun looking at other projects – if you have a spare
minute, I suggest taking a look.