Looking thru the Blizzard support forums, there seems to have been an issue with the remote AH, which I do use daily. Which might be why it was taken down over the weekend:

https://us.battle.net/support/en/blo...ouse-6_22_2013

Plus, there are a few threads on accounts getting hacked recently with the authenticator on them. Still looking thru the threads, but haven't seen any comments from Blizzard on the issues yet.