[Lucky Larry] posted some pictures to the Hack a Day flickr pool that caught our eye. He made a quick and cheap servo driven arm. Constructed from foam board and some hobby servos, he’s using an Arduino for the brains. You can download the pattern for the arm pieces as well as the code on his site.
He ultimately finds that he has positioning issues that he blames on the cheap servos. You can see in the video on his site that the circles it is drawing are drifting one direction.