My Dream App will give away free copies of the new iTunes library sharing application Musicast for Mac OS X during the contest’s third round of voting today. The remaining My Dream App finalists are competing for the chance to have their ideas developed into full-blown Mac shareware applications. To assist voters this round, high-profile UI designers and icon artists have commented on the finalists’ ideas. These guest judges include popular icon and user interface designers Adam Betts, Jasper Hauser, Bill “BBX” Bart, David Lanham and more, with a shared client list including Microsoft, Disney, Motorola, and others.