I m gonna rig my smart phone with a Polar WearLink+ transmitter with Bluetooth wireless technology
Another crazy use for smart phone.
Considering US military will use the google nexus one for individual payload, I would not be surprise that they get a heart rate sensor to remotely detect fallen soldier.
Rig in a guncam (with IFF app that ID camo pattern) and a parrot UAV, you are cutting edge with civilan tech, until your parrot get blow to piece by 6 mm bullets
http://dvice.com/archives/2010/07/defense-contrac.php