Put your pedal to the, er ... OLPC

I'm not sure if this model OLPC netbook is the VIA based version or not, but look, it has ever lasting power - or at least as long as your legs can take you!

"There are already hand cranks available that let you charge up an XO Laptop while you’re not using it. But now the folks at OLPC Afghanistan have built a machine prototype that lets you charge the laptop while you’re using it by connecting a hand crank to a pedal. In other words, you can sit at a desk and pedal away to generate electricity while your hands are free to actually use the computer." - Liliputing