
Moddy has a step by step guide on hacking up hand crank flashlights with a USB port for charging 5V gadgets (electronics that get their power or can be powered from the USB port)...Link.
Hand crank flashlight - USB charger
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Oh, that's very similar to the iPod-hand-crank-charger I made quite some time ago :-)
http://geektechnique.org/projectlab/236/how-to-hand-crank-power-your-ipod
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