Wind Up Media Player
Wind-up radio inventor Trevor Baylis is now dropping a wind-up media player very cleverly named the Trevor Baylis Eco Media Player. It can be charged via USB or hand crank, and (although I don't believe it) one minute of cranking powers the device for approximately 40 minutes. It has all the features you would expect from a media player (except maybe this one being the size of a brick) and retails for around $350. Someone come up with a gerbil wheel mod for this thing and then you'll be onto something: a media player with a damn gerbil attachment that I still won't buy. Maybe.
Wind Up Media Player [tech.co.uk]