I have a USB missile launcher and a .NET library to control it (it did have a webcam stuck on top and was remote controlled via a website). I'll bring it along if anyone wants to play with it, could make it track movement via a webcam or control it from a wii controller or something. - Thom

Questions:

(@oomlout)

-looks like fun, I'll bring a nunchuck and have some code to connect it to an arduino. But if you're using a computer to control it over USB I'd take a look at GlovePIE it is a wii mote "driver" which allows you to write macros to map keyboard pushes to button push, or accelerometer values, that and a Bluetooth dongle and you're off to the races.