I guess my biggest question is, just how un-eco-friendly is your average motorcycle, anyways? In other words, is this the answer to the question that wasn't asked?
I think you could take your most non-enviro minded streetbike and it would still come out quite favorably in an emissions test against the standard SUV, station wagon, or family sedan out there. Set me straight if I'm way off here, please.
And, according to jmeyn who posted this story, this bike cannot be ridden in traffic (or at least below 16mph) for extended periods without annihilating the battery. Fabulous! Now that's really thinking! So basically, as a commuting bike (and what else could you actually want this bike for?), the thing is useless.
Lastly, exactly what part of a 125cc two-stroke engine is more emissions-friendly than your average four-stroke? Last I checked, two-strokes belch fumes like a chimney?
Anyways, all my snide remarks and sarcasm aside, I really think this is a good idea whose time has come. What I'm really waiting on, however, is the hybrid-powered Ford Excursion. I think that one of those alone would be worth about 1,000 of these little ecobikes in terms of reduced emissions.