Google has announced the fifty winners of the Android Developer Challenge Round 1, each of whom wins a $25,000 award to fund further development, and the chance to be put forward for ten $275,000 awards and ten $100,000 awards in round 2.

Winning applications include a number based on the underlying maps functionality, which isn’t surprising given this is one of the core features of Android upon which developers can build, plus GPS-based social networking services (find your friends, for example), a biometric authentication system, instant messaging services, educational software, and online information resources…