However, diesel-powered VW's don't exactly have clean exhausts yet, at least here in the USA. They'll be a lot cleaner once the EPA mandates low-sulfur diesel fuel in 2004 and automakers can introduce diesel engines with modern fuel delivery and emission control systems (like what you see in Europe now), both of which are easily damaged by the high-sulfur content diesel fuel sold in the USA.
Anyway, I've driven a hybrid car (my brother's Toyota Prius). It's an interesting
driving experience, to say the least; it takes some getting used to with the instrument panel in the center of the dashboard and the unusual acceleration and braking of the car. It's quite a roomy car for its size, though.