do you know about the Beehive in Canton? It's a coworking space you might really like, lots of hackers work there remotely http://beehivebaltimore.org/
tvon, if you live in Mount Vernon, you should try and check out http://www.twitter.com/CoworkCharles as well. It's a bunch of techies getting together to cowork at coffeeshops with free wifi along Charles Street, happens about once a week.