This new trailer from Diablo III introduces the Wizard in Blizzard's upcoming action/RPG sequel. The clip includes cinematics, gameplay, and an imposing voiceover to explain the arcane power of this mystical class. Presumably the wizard's chirpy (if not twerpy) little voice is a spell so her enemies mistake her for Seong Mi-na or something.
I found the Witch Doctor to be the weakest, but the Monk and Demon Hunter were pretty powerful. I never got a chance to try the Barbarian or Wizard in the beta, but in two weeks I can