Blizzard went from opening up the beta sign-ups for Mist of Pandaria one day, to launching the beta the next. Very unexpected and out of character, but a pleasant surprise to all.
The gates to Pandaria opened up late last night and will allow players to experience the first 10 levels, during this first beta phase.
Invites are still being sent out, with Annual Pass holders at the front of the line, followed by everyone else. Good luck to everyone.