
The X-prize offered rewards totally USD$10M to be split among three winners, who have been announced. The winner was the 100mpg+ ethanol-based “Very Light Car” from Edison2 LLC of Charlottesville Virginia, who came away with a cool USD$5M. One of the other two winners achieved the remarkable feat of 197mpg!
It appears, however, that the Urbee is still under construction and is expected to be operational in March 2011. According to Urbee:
the car is not yet running at this time. Only three body panels are in place, but these highlight the unique approach taken in designing and building this car (from clay sculpture, to scanning by Tebis, aerodynamic simulation by CD-Adapco, and direct digital manufacturing by Stratasys/Redeye).

Will 3D-printed cars become the norm? Likely not for mass production, as it would be prohibitively expensive to do so. However, if it ever came to be that consumers could somehow choose their own styling or sizing, one-of-a-kind 3D printed cars might be the right approach. But it would still be fantastically expensive.
Via Stratasys