Bruno is correct.

I just performed a network traffice trace on their IP addresses between 0600 and 0715 MST. They are receiving a lot of page requests, but not enough to suggest a DOS attack at all. Looks like an ordinary (semi-heavy) traffic load. Could be all the above is wild speculation (including my earlier posts), that they are indeed down for maintenance, but ran into some unexpected delays in bringing the system back up online.