makerfaire.com:

Maker Faire Bay Area 2009
The Eggbot Project

Location: Fiesta Hall 336

"Eggbot" is a spherical plotter (machine for drawing on round objects like eggs and balls). It works using two stepper motors whose motion is controlled by software. The goal of the Eggbot project is to provide an entry level experience for people to learn the basics of motion control - the foundation of robotics.

Web site: http://www.taomc.com/educational_uses/teaching_machines/eggbot.html

About the Maker(s)

Bruce Shapiro [
Bruce Shapiro has been experimenting with motion control for about twenty years. He creates large computer-controlled, kinetic sculptures for science centers throughout the world, and has taught motion control classes. This year, he is teaming up with Brian Schmalz and his son Ben to take his first motion control device, "Eggbot," to the next level.
http://www.taomc.com