No doubt eventually Apple will introduce their Apple iPhone 3G with incorporated solar cells to power the Apple iPhone, but until then probably a cool option is the Solar Arcadia solar powered iPhone case.
There are two versions available, a SideFlip case and a Leather Flip case. Both version offer sturdy protection for your beloved Apple iPhone along with a solar panel enabling some extra life for the iPhone while you’re out and about.
Both cases are constructed in ABS sheepskin, the SideFlip is available in red, black, and white, while the Leather Flip is only available in black, and carries a not too bad price of $45.95.
Source — Tuaw