If you're an Atlassian user, or even just interested in our products, we have an upcoming User Group meeting in Falls Church, Virginia that might appeal.
Google Maps tells me that it's very close to Washington, DC too.
There are a few short sessions from partners and users, as well as a demonstration from one of the companies building on top of our applications, GreenPepper. I'm sure I'll write more about them in the future, but for now attend and see a demo. It's fantastic stuff.
Thanks to our partner IntelliObjects for doing all the hard work of putting it together.