My Dream App, a Mac contest in search of the next killer app, features as guest judges Apple co-founder Steve Wozniak, Apple evangelist Guy Kawasaki, and Xbox and zune creator J. Allard. Over the past month, contestants have had to brave weekly elimination rounds while continually demonstrating to the voting public why their application idea should advance in the contest. My Dream App will announce its three winners when voting ends Tuesday. Winners, who will have emerged from an initial pool of more than 2,700 entrants, will see their idea realized as a Mac shareware application and earn royalties on sales.