CMU team builds robotic snake
download.srv.cs.cmu.edu
download.srv.cs.cmu.edu
Another interesting project they've got going (which seems like it might be related) is their work on modular robots using electromagnetics or static charges. http://www.youtube.com/watch?v=e44hA6IBtkA (Link goes to a short New Scientist clip regarding the project.)
AJ Ijspeert, A Crespi, D Ryczko, JM Cabelguen. "From Swimming to Walking with a Salamander Robot Driven by a Spinal Cord Model." Science 9 March 2007: Vol. 315. no. 5817, pp. 1416 - 1420
http://www.sciencemag.org/cgi/content/abstract/315/5817/1416
Videos and Photos: http://birg.epfl.ch/page65446.html