Yep thats right they are out and I just got it in the mail!
Congratulations, this is your invitation to the beta test for Blizzard Entertainment’s StarCraft® II: Wings of Liberty™! You are receiving this email because you attended a special Blizzard Entertainment event, participated in a related contest or promotion, or have otherwise been selected to join the beta-testing process. This email contains your beta key along with instructions on how to get started.
As a beta test participant, you’ll have the opportunity to experience the multiplayer gameplay of StarCraft II: Wings of Liberty and explore the social-networking, matchmaking, and other new features of Blizzard Entertainment’s revamped Battle.net® online-gaming service. Throughout the StarCraft II beta test, you’ll be able to take part in cooperative and competitive battles as the terrans, protoss, and zerg -- and at the same time, you’ll be helping test the stability of the Battle.net service and fine-tune the game balance prior to launch. The developers look forward to hearing your feedback and seeing you on Battle.net!
I'm off to PLAY!!! will report back soon!