Meet the WidowX Arduino Robot Arm: a cool tool for those of you experimenting with robots. It has MX-64, MX-28 and AX-12 servos, a rugged ABS construction, and Arbotix Robocontroller for onboard processing. You can mount cameras and sensors on it quickly. The WidowX Robot Arm has up to a 41cm horizontal reach and 55cm of vertical reach. The gripper has a holding strength of up to 500g.
The above video shows this Arduino compatible robot arm in action. More information is available here.