Are you still looking? I might have a recommendation. One of my cousin's roommates is moving out and they're looking for a replacement starting June 1. Don't remember when you needed the place for (or even which of you lovely GTers it was looking).
So basically anyone looking for summer or more permanent housing in DC drop me a line on this post. I don't know much about it (like price) but I thought I'd share since I know a lot of ppl move to DC for the summer internship season. (And welcome to DC, all newcomers! Hope you can make it to the upcoming meet-up!)