Bi-pedal is a stupid idea, Bi-pedal is slow, easy to knock off balance, they already have an incredible four legged version, what a waste of time ...
this is the robot the army will be using ...
http://www.youtube.com/watch?v=cHJJQ0zNNOM
Bi-Pedal will never match up to this ...
Read the article. The purpose is to test soldier gear with a simulated soldier that moves like a real soldier.