Who needs wheels when you have, uh, legs. Lots of legs.
Enter the Cajun Crawler -- a project that was completed for the Fall '08 semester at the University of Louisiana. The scooter was inspired by Theo Jansen's leg mechanism (see videos below). According to the developers, the Cajun crawler's legs are made of standard 5052 Aluminum and the joints all contain deep-groove ball bearings; smooth as silk.
As noted, the device was inspired by Theo Jansen's kinetic sculptures: