Buy on Amazon: 

Solio Universal Hybrid Solar Charger (Silver)

The Solio Universal Hybrid Solar Charger is a portable device for charging small electronic devices that charges itself via the power of the sun. The Solio has three panels that fan out in a flower-like shape to charge an internal lithium battery. They claim that you can charge a variety of small devices, mostly cell phones, iPods and the like, and a fully-charged Solio will "give over 20 hours of iPod music.." I've been using the Solio to charge my iPhone off and on for the last month or so.