Dorm rooms are available and you can view the information and sign up online: http://www.bmwra.org/rally/lodging.html.
When I registered online, I received a message indicating that I would get an e-mail confirmation in two days. That didn't occur. I called this morning and talked to Ethan, the guy handling the matter. He said they are a little bit behind and that the confirmations will go out this week.