Make:

Interesting story on CNET about these open robots, the best part is the documentation on TeRK site, it's outstanding -

Carnegie Mellon University unveiled a new project Thursday designed to help people make robots from parts found at the local hardware store.
The Telepresence Robot Kit, dubbed Terk, was developed by Illah Nourbakhsh, an associate professor of robotics, and his team at the Community Robotics, Education and Technology Empowerment Lab at CMU. The project got financial help from Google, Microsoft and Intel.

"Everything is open source and public domain," Nourbakhsh said. "There is no incentive to make money here. None of the corporations that funded are looking to license this. These companies gave us gift money--even better than grant money because there's no strings--to help us try and come up with ways to get people to be more creative with tech and more tech-literate."

More:
Build Your Own TeRK Robot With Robot Recipes - Link.