I was in earlier, but now I'm getting that login identity expired message as well.
I guess they are still doing something from the maintenance that had it offline a few hours ago.
It came up for a bit in the middle of that, I got online, did some actions including the octoberfest, then an hour or so later when I checked on things, none of what I had done was there, it reverted back to when I was still sleeping.
ahh, the joys of beta testing