Yup, you heard it right, you can now enlist for the public beta of StarCraft 2

In order to sign up for the StarCraft II beta, you first need to register a Battle.net account. You can opt in to the beta for StarCraft II, as well as betas for future Blizzard Entertainment games, through our new beta opt-in process. To get started, simply click "Beta Profile Settings" in Battle.net Account Management.

To be considered, you must create a beta profile containing your system specifications (see below link) and indicate which Blizzard Entertainment games you’re interested in beta testing -- be sure to check the box for the StarCraft universe. Once you’ve successfully uploaded a beta profile, the associated Battle.net account is added to a pool of potential beta testers.

www.starcraft2.com/beta-faq.xml