The beta testing phase for the new World of Warcraft expansion pack Mists Of Pandaria is fast approaching. Blizzard have now added an option to Opt-in to the expansion pack's beta testing phase. The beta will be exclusive to Battle.net users and subscribers to World of Warcraft . All you need to do to sign up for the testing by visiting Blizzard's Battle.net beta site. The only requirement is that you need a Battle.net account with at least one game attached to the service. Essentially if you have World of Warcraft or Starcraft II you can go sign up right now!
Although Blizzard have not announced when the Beta will commence they did say that it's "very close".