This is quite the old project: http://www.tlb.org/scooter.html
But this guy built his own Segway clone using a few big motors, some batteries, a gyro and some C code.
I was wondering if this could be done with the Arduino with some cheap components and sensors?
I don't have a Arduino yet (coming soon!) but I wouldn't mind trying to produce a very simple version of this. Even if I could just find the cheapest gyro out there and see if I can appropriately read values from it and try to drive a small motor based on data from the gyro.
Looking forward to getting my Arduino kit, I've got a million ideas in my head; just a matter of implementing them!