Question: do any of you know when that weekend is this summer where students come to meet possible roommates?
There is actually a post on the admitted students forum about this. They said it looks like the end of June, but will divulge more details as they become available.
In the meantime, you should check out craigslist. DC is HUGE on it. Also, if you want to live alone, PM me and I can recommend a great place that is a steal.