
If you want to make a project that is a bit creepy, this Robot Spider is for you. It uses a powerful Parallax microcontroller so it could also be adapted for many other purposes.
"Microcontroller:
Javelin Stamp (with Ubicom SX48AC, Parallax)
Sensors:
1x ultrasonic sensor (Deva-tech SRF04)
2x sensor with micro-switches Actuators:
3x Standard Model servos for the musculoskeletal
1x Micro servo to the pan of ultrasonic sensor "
http://hackedgadgets.com/2008/07/04/robot-spider-powered-by-a-javelin-stamp/