I, too, am fascinated by the idea of distributing electrical power wirelessly. This is the kind of technological breakthrough that could completely change the world. Can you imagine a world where electricity was basically free, and could be provided to any location on earth for very little cost. How would social structures and institutions change in response to that?
You are right that the availability of a steady, reliable and cheap source of electricity is the central impediment to success with the One Laptop per Child initiative. These laptops are incredibly sophisticated and well-designed, yet their usefulness at all comes down to questions that have we have been struggling with for over 100 years. I think that there will be a lot of effort in the near future on developing many different approaches to providing electricity directly to where it is needed via satellites that act as giant mirrors. this is very large scale engineering, and beyond the subject matter of this course; but I can think of other, smaller scale design interventions that could be used to provide power for computers in villages around the world, through some form of animal power generators, or other innovative ways to harness locally available resources. Think about what people have a lot of, then figure out a way of using that to make small amounts of power.