I love this hack. Mark Hoekstra over at geektechnique
has hacked together a iPod charger for his bicycle that works off the power of his legs! Better yet, he's written a detailed how-to with tons of pictures so anyone with the gumption to do so can make their own Bicycle iPod Charger.
If only my bike didn't get jacked when I first moved to the Bronx 5 years ago...