One Laptop Per Child (OLPC) is an initiative to try and get information technology to those children in the world that do not have it. Some people think it is a great idea, others don't but the merits of this project I don't think can be measured until it is in full swing. Hopefully it will be of benefit, after all anything is better than nothing.
The Human Interface Guidelines have been available for a couple of weeks. This covers "Sugar" the laptop user interface and how to develop applications for it. There is a great blog post from Mike Hearn that extracts the essence of the guidelines. It looks like there could be some interesting UI features on the little laptop.