Sorry for the downtime today folks. Apparently there was a major power outage in Los Angeles, where my hosting company, MediaTemple, is located. However, they seemed to have recovered quickly. To my knowledge the power outage was roughly 3 hours starting around 4 PM. However, I am not certain as to whether (mt) used any power backups.
Update (9/13): MediaTemple has posted a statement about the causes of the power outage.