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@TheBrick(Tommy)
These are two DIY ones I found when I looked into it but decided it was too expensive just to charge a phone.
http://www.mark-ju.net/bike_ride/equipment/charger.htm
and
http://www.crazyguyonabike.com/doc/?o=3Tzut&doc_id=3295&v=3B&term=dynohub&context=all
just found this too
http://garote.bdmonkeys.net/bike_charger/