The GDC video archives are turning up new Blizzard related videos and there’s a GDC 2010 talk with Rob Pardo, who is no longer at Blizzard, which takes a look at some of the key philosophies underlying Blizzard’s game design.
The video looks at successes and failures of Blizard games. Just a shame they got Diablo 3 so wrong.
Thanks to DJE for the tip.