Just wait until the GDC sees this: a
slime-riding robot [
NewScientistTech] that uses adherent polymer to gain traction to the intestinal wall.
Right now it's just a proof of principle, but according to the article "[its developer, Dimitra Dodou (Delft University of Technology)] plans to test a prototype snail-bot carrying a camera, a tool for taking biopsies and a communications link inside a length of pig gut."
I say: Chutes & Ladders in FRC 2008!
(I get a little envious to think that this is the kind of stuff some our biomedically-oriented students might be working with when they start their careers)