The World of Warcraft Website now offers a Mists of Pandaria Beta Opt-in and FAQ with details on how to participate in the beta testing of the upcoming World of Warcraft expansion and answering pertinent questions about the testing and what the add-on will bring to Blizzard's MMORPG. They also say that they will be inviting annual pass holders into the beta in waves, and will be ramping up this process as quickly as possible.