If I opted in to the StarCraft II beta, how will I know if I’ve been selected to participate?
If you are selected, you will receive an email from Blizzard instructing you to log in to your Battle.net account at www.battle.net. You will be able to download the client directly from within Battle.net Account Management. We plan on inviting players in waves, so if you do not receive an invitation in the beginning of the testing period, there’s a chance you might receive one in a later wave.