Hi-Tec backpack from O’Neill
O’neill have made a backpack with solar panels. These panels will charge your mobilephone via USB-adaptor. The solar-cells will also charge your iPod via FireWire. You can also provide charge to Bluetooth modules.
Other than that and standard stuff such as padding, shovel holder, waterproof zippers, boardstraps it also has integrated controls for your phone and iPod. It’s even intelligent, if you listen to music and you get a call, the music pauses, and the call is put on. When the conversation is over the music starts playing again.
Productpage at O’Neill