The Grand Finalist Acts will be awarded cash prizes -- First Place receives $4,500 USD, Second Place receives $3,500 USD, Third Place receives $2,500 USD, and Fourth Place winds $1,500 USD. This is in addition to the airfare, hotel, and BlizzCon tickets. Needless to say, there is a pretty big haul to be had! To enter, head to the BlizzCon contests page -- and while you're there, be sure to take a look at the official rules as well.
As a reminder, all entries are due by August 6 -- so get moving, and good luck to all who enter!