An interesting twist has occurred with the Bio-harness of Zephyr Technologies and i-Rule. i-Rule is a sportswear innovator and they have made the Sputnik.

How does this relate to Facebook? Simple, the sensor in the shirt can transmit the data to the cradle. Using the Sputnik software, it can then be compiled and uploaded to Facebook. This help so you can show your friends what a physical specimen you are.
The shirt can can measure, transmit and record key athletic performance attributes such as heart rate, respiration rate, skin temperature and posture. Its not integrated as neatly as NuMetrex, but hey its a start.