Starcraft 2 Beta Keys to be at Blizzcon?

Blizzard announced some of their things they will be giving away to visitors at the Blizzcon event. Included in the gifts is a "beta key to an upcoming Blizzard game" (Starcraft 2 anyone?). Also included will be a passcode for an unlockable murloc suit for one of your characters.
[From WoW Insider]

This is just a RUMOR. The upcoming game could be anything, but the only upcoming game I can think of is Starcraft 2.

P.S.: If your interested in Starcraft 2 IGN has just released an interview with Blizzard about the upcoming game. You can get to it here.