Re-charge Your Cell Phone Using . . . Air??
Yes. Slashdot has a story about a mobile turbine which generates 3-4 watts of energy (enough to charge your cell phone), runs on air, costs about $4, and fits in your pocket. It looks like it was created by the students at the Department of Industrial Design at the Indian Institute of Technology, so I’m not sure it is actually on the market — but it should be!