Haha, that will teach all of us to ever going off this addictive game
And i confirm the same, i had 2 players logged in, i logged off for a second on one of them, then logged back in... not working.
And the idiot i am tought it be a good idea to see if the other player would have the same issue... now both of us are not able to get back in.
Sad to say but i guess we'll all have to wait untill the magical IT guys out there fix it.