I felt exactly like you, but well, seems I've got lucky.
Thats simple, you get your new B.net account, set that you want to parcipitiate in beta (They'll test your PC stats btw) and then you'll have to wait. Also you have to have at least one game registred to your account.
Oh, and if I'll get a friend invite, I might give it to you trolma... Alagremm!