"Solio™, the Universal "Hybrid" Charger is powerful enough to charge all of your handheld electronic products at home or on the move, anywhere under the sun. It works by absorbing power from either the wall socket or our very own Sun storing this energy within the Solio's own internal battery. Solio is the universal charger of the future because it can use free energy from the sun which is good for the environment while saving you money on electricity costs."
Where I'm located (Australia), there's plenty of sunshine, so Solio would probably make a great accessory for my Pocket PC and Zune. At around $80 USD each, is this something you'd be interested in picking up?