How is Blizzard deciding who gets Starcraft 2 beta keys?

There must be some algorithm-- some reason behind who gets those precious beta keys... Could it be based on rare comp specs? Because they want to test out SC2 on different hardware? Or could it be based on how much a given account has played blizzard games? I don't know. Anyone who has any inside knowledge would be greatly appreciated.|||It is comp specs. The game is finished they want to test the spectrum of how well the balance works and how many units they can predict to pump out at the end of Q2.|||Blizz usually does a sign up for their betas and the send out the keys to random players. They did this for WOW so sould be similar for SC|||They're giving it to the worst SC players first. If you suck, you'll probably get one.|||I read online somewhere that they were letting players bid money for the passes. like i think someone paid over 100 dollars for one.