[UPDATE 5:55AM] The best news is we were able to head off the problem before it became worse and things should be returning back to normal as we speak. : )
The bad news is 400 regions are currently offline and we suspect that many more may be affected by the same problem over the next few hours. This can happen without warning and we do apologize. We know how disconcerting this can be.
The good news is we know why this is happening and are working feverishly to prevent it from continuing as much as possible and repair the damage that has already been done. Please bear with us while we continue our efforts to bring everything back to where it should be. We will provide updates as we have new information.