In case you don't know about "Big Dog", several years ago the company Boston Dynamics, with funding from DARPA, developed a quadruped robot to transport loads for U.S. military troops. The videos released from testing were very impressive, with adaptive balancing in real-time and the ability to move over complex terrain very well. I'm interested in their LS3 robot they're developing for the marines. It could be very cool how they'll adapt and improve on what they've already created and proven to be worthwhile engineering in the released test videos. Here's a video of "Big Dog" in case you have no idea what I'm talking about. Go robots!