MyFC is a fuel cell company that is showing prototypes of fuel cells that could be built into cases a la the Mophie. The cells run on small hydrogen packs and can fold over surfaces. They could even be embedded inside cellphone bodies.
The company has two products, the 1636 chip that fits inside a charger-sized enclosure and the FuelCellSticker, the bendable model. The maximum output is 0.9W at .5V while the four-cell model outputs 3.2W at 2V. It is .11 inches (3mm) thick and weighs a mere .2 ounces (5g).
The company is currently making these devices to order and they are reasonably priced at consumer levels. The 1636 reference design works now while the bendable models are available in any shape and size.
Don’t look for these at Circuit City just yet, but they’re amazingly close to production.