BodyKey Adaptive Fitness Tracker
BodyKey is a two-part system: a physical device you keep with you, and a web app online. The physical device carries a urinalysis slot, designed to measure fat loss. Urine analysis is done with disposable cartridges. The key idea is to use urine analysis as a way to personalize efforts towards fat loss -- helping people figure out what works for them.
BodyKey is not yet to market and at 3/2011 appears to still be in development.