in 2006 matt denton made a six-legged interactive robot, i.c. hexapod, that tracks peoples faces.
each leg has 3 hobby style servos and there are some servos to move the head. each servo is connected to an on board processor called the p.brain which has a 16bit PIC processor running at 59Mhz. the p.brain looks after all of the leg and body locomotion functions. a second computer is connected to a ccd video camera on its head that takes pictures and uploads them to i.c.'s website.