I was on an playing late saturday early sunday this past weekend. I just attempted to log in and I'm given an error. I've checked my account online and it doesn't show any failed attempts or a ban. I was able to change the game client's password using the provided tools and even the automated system, non of these passwords let me in the game.
On the log in screen I see that it is connected to the TrueWoW server and the realmlist is unchanged since this weekend.