The above video was found at http://meinekleinefabrik.blogspot.com/2010/06/shall-we-motor.html
The Dymaxion attained 30 mpg, which was unheard of in any car of it's time. It could carry 11 people, was a three wheeler, steered by the rear wheel, and could do a U-turn in its own length, which was about twice as long as a car of it's era at 20ft, and was shown to the world at the Chicago 1933 World's Fair. http://en.wikipedia.org/wiki/Dymaxion_car
For a gallery of it being built and displayed: http://community.livejournal.com/dieselpunk/166227.html
http://www.washedashore.com/projects/dymax/chronology.html
For some interesting inventions, or ideas, by Bucky... see http://www.goodmagazine.com/section/Guide/good_guide_r_buckminster_fuller_3_of_6