Check out this article/video from CES.

Hydropak portable fuel cell -- hours of power for camping, outtages and so on.

This is the future...today:

http://www.informationweek.com/blog/main/archives/2009/01 ...

First, Horizon Fuel Cell has a retail version of its Hydropak, the final outcome of last year's prototype, and it's got double the power at 50 watts. You can plug in 110-volt, 12-volt, and 5-volt DC power sources, and you can get five hours at full power. It runs $400 for the unit and the cartridges are about $30. Once you activate them, you can keep refilling them with water and using them for 30 days.