This sounds like a goodin! If it works, could be the remedy for a lot of homesteaders.

The multi-functional stove called SCORE, a stove for cooking, refrigeration and electricity generation works by converting heat into acoustic energy, which in turn is converted into electricity with a linear alternator. Due to its highly efficient nature, the stove can run an hour on a single kilogram of fuel. It consumes three times less fuel in comparison with its counterparts. SCORE weighing somewhere between 10-20 kilograms would cost $33. Researchers are presently performing field trials in Nepal and hope it to hit the market soon.

How It Works
Source: Discovery coverage:
Wood is placed inside the stove and burned. The fire heats compressed air that has been pumped into specially shaped pipes located inside the stove's chimney and behind the stove. The heated air begins to vibrate and produce sound waves. Inside the pipes, the noise is 100 times louder than a jet taking off. But because the pipes are stiff and do no vibrate, the sound waves have nowhere to go. So outside the pipe, people hear only a faint hum.

The sound waves vibrate a diaphragm located at the end of the pipe. The diaphragm is attached to a coil of metal wires that sit inside a magnet. As the wire coil vibrates — about 50 times per second — it generates an electrical current, which is captured by wires and converted to the proper voltage.

The stove has electrical sockets, where the homeowner can plug in, for example, a mobile phone for charging. Or she can sell the electricity as a phone-charging service.

For refrigeration, the heated, compressed air is sent through a different part of the pipe, where sound waves cause the air to expand. As it expands, it cools to a temperature that can produce ice. It takes about two hours of stove use to produce enough ice that will keep the fridge cold for 24 hours. But homeowners have the option of producing more ice to sell for income.

Here is good reading on these stoves.

http://tingilinde.typepad.com/starstuff/2009/07/score-stove-for-the-third-world.html

http://peswiki.com/index.php/Directory:Acoustic_Generator:SCORE:Stove_for_Cooking,_Refrigeration_and_Electricity