I have a satellite phone and I might even considering buying one of these. Considering that Iridium wants $34 monthly with no bundled minutes for a service plan, this is a bargain at under $100 per year. The google maps tracking is pretty slick too.
http://www.findmespot.com/
http://www.adn.com/outdoors/story/256352.html
http://www.findmespot.com/
http://www.adn.com/outdoors/story/256352.html