RackSpace will be performing maintenance on the site's database server tonight (Thu, May 17). Due to this maintenance, the site will be mostly unavailable between the hours of 10:00 and 11:00 CDT (approximately). The forums should remain unaffected.
I complained about the near-peak hours of site use being chosen for this process, but I'm apparently not important enough to have any impact on the RackSpace-chosen times. They will give consideration to my request for the next planned maintenance downtime.