If you're interested in attending, now's the time to register.
I can't predict if all the spots will be taken or how quickly. For Moab '08 all the spots were spoken for in 2 days. For Sierras 2010, it didn't fill up, but not until a couple weeks before the event. Registration is currently open only for Syncronauts who will commit to attend the entire event. If the spots don't get taken after a while, part-time attendance might be arranged and/or 2WD Vanagon attendance.