The Bivy Stick [Kickstarter] and a little bit of a write-up at Gear Junkie
Bivystick gives you peace of mind when you are off the grid by turning your cell phone into a satellite communication device. With no contract or activation fees, you can turn it on only when you need and save money when you don't. Bivystick allows you to send and receive text messages, share your location, track your path, send an SOS message in case of emergency, and access detailed weather forecasts when you are out of phone service.
Please note: You will need to use a forwarding service as they only ship to the US.