Giving us a quick heads-up this afternoon, Blizzard Entertainment has announced that the closed beta test for their upcoming StarCraft II: Heart of the Swarm expansion is officially underway. The beta will start out limited to a select group of pro-gamers, press, contest winner and shoutcouters. But don't worry! The general public will be invited very soon. To sign-up, log into your Battle.net account and click the "Beta Profile Settings" under your Account Management. Good luck!