clarionhaze writes "Many have tried, and failed, at getting a robot to sustain it's own balance. However; Steve Hassenplug accomplished it with with a small robot he made out of legos and a program in C that runs on BrickOS, an OS made for Legos! You can check out his site or read the article over at TechTV." Update: 01/18 15:52 GMT by T : Unanimous Cow writes "David Anderson of the Dallas Personal Robotics Group has an excellent web page with images and movies of his two-wheel balancing robot. This one uses a single-axis inertial measurement sensor and is very robust on uneven surfaces and off-road."