The remote controlled flying toys which you find in Radioshack are now adding iPhone support. Parrot
Check the video, the thing is fun. Whats more fun is controlling it with your phones. If set up with a wireless webcam, this can be used for remote surveillance of your home while you are in vacation to India. The day of using your phone to control your life is not far away 🙂 .
Check the official demo video of it