Designed by Gabriele Diamanti, the Eliodomestico is designed to be an easy to use, small scale solar device to turn brackish or salty water into freshwater for cooking and drinking.
He recently won a design award: http://www.core77designawards.com/2012/recipients/eliodomestico/
and
profiled here: http://www.fastcodesign.com/1670546/a-simple-solar-oven-makes-salt-water...
The design is still in the beginning stages, but it is an interesting application of existing technology.
