Our ISP was performing scheduled maintenance tonight between 10pm-12:30am PST. During this time, there has been a network outage while they move the servers to a new datacenter.
It appears they are taking a bit longer than was expected, and I've been told we should be back online in the next 45min
UPDATE: 2:41am - the server move took them a lot longer than the estimated time given. They moved the app server... but left the database server behind - it should be back online within another hour.
UPDATE: long night... finally, at around 3:30am, all sites back online