Matt, I think most people on this forum realize that the smart cars look is specifically designed to have the most amount of interior space in the smallest possible foot print. This results in the dorkmobile look (like an xb). Obviously the smart would benefit greatly with a sleaker/more areo body, but the interior space would suffer.
look at this car. It is built with the same engine/ chassis as a smart. It also gets much better mpg. Unfortunately it would not have mass appeal because of the cramped interior and strange look.
__________________
__________________
2008 EPA adjusted:
Distance traveled by bicycle in 2007= 1,830ish miles
Average commute speed=25mph (yes, that's in a car)