Run while you ride on the elliptiGO bike which sounds like a kind of neat idea until you see it. Then it looks like an ungainly monstrosity that should have been left on the drawing board.
If I wanted to go running, I'd go running. If I want to ride a bike, I'll ride a bike. This bastard crossing of the two makes little sense to me and I highly doubt there's much of a market for them.
Its an interesting looking contraption, to be sure, but I just don't see that many runners who would want one nor very many bikers who would want to run instead of pedal either.