Difficulty Levels & Builds - Diablo III Gameplay & Auction House

The BlizzCon 2011 panel goes into detail about the different difficulty levels for Diablo III and what to expect. The game testers also give an insight as to what to expect from Nightmare, Hell and Inferno difficulty levels. Class builds are talked about also where an optimal build was not the goal of the game but viable builds where you have virtually limitless customisation.