I am speechless, really. I have no idea what is going on here, but wow.
Interesting contraption, highlighted on the Hippy Gourmet. The tie-dye shirts, the bush stuff, and the crazy way these guys talk will feed all sorts of negative hippy stereotypes, but people like this are some of the people that were vital in starting the renewable energy movement (along with a lot of scientists, inventors, and straight laced business people). Like any trend it starts with a fringe group, and if it has merit it moves towards the center and the masses pick it up.
I found the machine pretty interesting, I wonder if legs are more efficient than wheels.
Update: the guy in the video, Robert Schneeveis