Starting last night and now this morning, I go to logon to the game and it just stays at the "Authenticating" screen and never gets past it. I've tried it on 2 different accounts, 2 different computers but I still can't get into the game going on 12 hours now.
I checked the forums and nobody else is complaining of this problem.
I get the same problem trying to login to account management at worldofwarcraft.com
It seems crazy that Blizzard would let a 12 hour authentication outage go without a comment though so I'm confused.