Two-wheel robot shoots for the Moon - Control Engineering covers open source Google Lunar X PRIZE team Frednet:
The team says its goal (besides winning the Google Lunar X Prize), is to bring the same successful approach used in developing major software systems (such as the Internet, and Linux) to bear on the problems associated with space exploration and research. In so doing, they plan to establish an Open Space Foundation that provides incentives, education, and funding to future individuals and organizations seeking opportunities in this final frontier.
Is it possible to stabilize a 2-wheel robotic vehicle? - Control Engineering's Ask Charlie gets into some JALURO physics and engineering.