I'm a developer in Baltimore looking for people to network and work with. I have 9 years experience of software development and business experience, the last 2 of those with a startup. If anyone is looking to get together in Baltimore and get something started, let me know.
Summize, Odeo, Mixx, FreeWebs, LaunchBox are all big names who hail from this area.
Also, DC has a very active social media scene, where many a fellow local entrepreneurs hang out and meet.
There is a big event coming up...see here http://twintech2.eventbrite.com/
Good luck - this is why I moved from DC to Boston (outside of YC's requirement). The startup scene in DC is pretty dire although LaunchBox looks promising and should help.
I still don't know what 95% of the people who work in DC actually _do_.
For business and tech events check out http://MarksGuide.com
He's been in Boston for a few years now and has just started opening more cities (W-DC, etc).