If you are at Blizzcon 2009 right now, there is a way you can play Diablo III and get to hacking and slashing. A dedicated area has been set aside to check out the demo build, which is set in a desert environment and gives players a chance to engage monsters as either the Barbarian, the Witch Doctor or the Wizard.
Players are also getting a chance to provide feedback on the demo, such as what they liked and did not like from the experience. Blizzard is taking the comments and immediately sending them to the development team to evaluate, so it is possible for fans to make their stamp on the development of the upcoming action RPG. Get the lines started.