A tiny PC using only 4 to 6 Watts has hit the market, with a built in wireless networking feature and able to run Windows XP. It can be powered from a solar panel (via a battery ideally) and is only slightly larger than a set of keys.

PolyFuel announced yesterday that they have a working prototype of their methanol fuel cell laptop which they will demonstrating across the consumer electronics industry. The prototype is a Lenovo T40 that uses a direct methanol fuel cell (DMFC). This technology converts methanol to electricity to run the computer. It's lighter lasts longer and paves the way for more eco-friendly electronics.