Anybody have any experience with green electricity when riding distances? personally I can't ride without music and i've seen a range of solar battery chargers "1-1.5 hours to fully charge 4AAA batteries in full sunlight, £16.79" for example, or the Trevor Baylis wind-up mp3 player - 1 minute winding for 45 minutes music with an integrated torch, e-book reader, MP4 player, and radio - at about the same price as an iPod. Could this stuff be fitted into general cycling? Could a wind up device with a crank handle be attached to a fork and spoke and charged while riding? Could a solar-panel be attached to the top of a pannier rack and left to charge all day? Cheers!