Yes.
Their scheduled maintenance today has fucked everything up.
They were supposed to be finished by 11am PST and when I tried to log in, only about half the realms were up. I rolled up a warrior on one of those realms and logged out periodically to see if my realm was up yet and 3 and half hours later, my realm still isn't up and it isn't appearing in the realm list at all. My realm did show up on the list once and when I tried to log in, it got hung up on the retrieving character screen and then timed out with an 'unable to connect' message.
Blizz has a message up on the log-in screen now saying they are investigating the issue as to why eveyrthing is screwed up.