DreamWizards is still there, Ross, but they've recently moved their store. It's not as conveniently placed as the old store, but it's much bigger. You can get directions to their new place on their web site (www.dreamwizards.com)
I live in Rockville, but my gaming group meets regularly in Springfield. We play a variety of games -- Shadowrun, Star Wars (not the D20 version), Trek (of course), and a variety of Hero based games. I'm the Trek GM, and the group is running through the Dominion War at the moment. If you're interested, let me know. (I'd have to clear it with the guys first, but I don't see that being a problem.)