As part of COMP 4060, our students just finished implementing a Mixed Reality Pac Man application using the mixed reality platform we have developed.
The robots are 2" infrared toy tanks, running on a 40" lcd and controlling the action of the game characters in the virtual world of Pac Man. Vision is provided by Ergo. Video of this and other mixed-reality applications are in the Comp 4060 video directory, a paper on this approach is in the publications section for 2007, and previous papers describe Ergo. Ergo is also downloadable from this website.