the guys over at thumpertalk spammed me with the Spot satellite messenger and personal tracker.
looks pretty cool. basically tracks where you are, allows you send text messages, lets friends track you on google maps, and you can 911 for some help.
explanation:
with Spot Satellite Messenger you can send a message for help or tell family members, friends or the emergency responders where to find you using GPS accuracy regardless of cellular coverage.
SPOT’s message and tracking functions enable users to send messages to friends, family or emergency responders, based upon varying levels of need and to visually track the location of the SPOT Satellite Messenger,
explanatory photo:
the unit is $150, plus unlimited messaging: $99.99/yr and tracking: $49.99/yr
Rescue insurance: $7.95/yr - GEOS Search and Rescue Benefit
not sure what rescue insurance is. maybe if they don't rescue and you die, you get money back?
http://shop.thumpertalk.com/product_p/wps_6246710.htm