http://www.wired.com/autopia/2013/02/3d-printed-car/
When the funding comes in, the head engineer is planning to take the latest prototype from San Francisco to New York on 10 gallons of gas, preferably pure ethanol. The hope is that the drive will draw even more interest. “We’re trying to prove without dispute that we did this drive with existing traffic,” Kor says. “We’re hoping to make it in Google [Maps'] time, and we want to have the Guinness book of world records involved.”
Yeah, it's a prototype and most prototypes never see production, and I'd hate to be stuck in this tiny thing for a drive from SF to NY, but the technology is fascinating.