Why bother with a beta?
      

  To clarify further, there's no universal bnet2 server blade and we just install different games on it. The service Diablo III will run on is completely untested, which is the top reason for the beta, followed closely by personal system testing, patching systems (also new), and gameplay feedback.  
      

http://www.blizzblues.com/us/why-bother-with-a-beta-27822632463.html