ZAP Smart Car Approved for Sale in the US
Great cars - driven one of the sporty cabrio, roofless ones around Mont Blanc. Amazing how cool the little turbo engine sounds in the back, like a mini Porsche.
They are also designed to park "end-on" to the curb - they are the length of a normal car's width. Great for those San Fransisco hills? ;)
Only downside is there's not much room between your arm and the window. They are generally very safe, but a friend's friend (sorry) toppled one on a motorway, slid it on its side and mashed his arm nastily.
I'd still get one for the city driving tho'.