FYI if you have not received your beta key don't bother e-mailing. you need to call and harass them. they responded to my original e-mail and stated that they would "review" my case and send me a ruling in up to 2 business days. i called and got my key within 5 minutes.
I wish blizzard didn't hook such a crappy company up with this offer. I'd even rather give my money to best buy than these assholes.