I'm building a robot for a class with an old Android phone as the brains using an IOIO board. I have a simple base and I'm going to mount the phone on a pan-tilt servo bracket. I just need ideas about what I'm going to make it do in the end. There's tons of stuff to tap into from the phone: gps, wifi, bluetooth, accelerometers. Something I can bring to work to make the engineers jealous would be awesome.