Pretty cool idea to connect smart phones if the cell grid is down using slick 2 watt aux radio antennas that bluetooth pair with your phone (one for each phone needed). GoTenna

Solves a problem that I have been wrestling with since Hurr Sandy in NYC - how to re-establish comms with my wife if cell towers are overloaded. In effect, they turn your iPhone into a text walkie talkie, but can keep the conversations private too. Would also work when hiking in back country and no cell service.

Range is dependent on landscape and antenna heights but theoretically is 50mi.

I bought a pair at their discounted pre-launch price of $150 and will report back when I get a chance to real-world test them.

Amat Victoria Curam,
-Joel