As a follow up to my earlier post on the One Laptop Per Child (OLPC) project, here's a link to the offical site, which contains all kinds of info on the device which is now officially named the XO. The Executive Officer? Anyway, it's a nicely designed site which seems to give a broad overview of all aspects of the project.
[Edited to include the next paragraph]
There's also a story at Wired about the security paradigm that is being implmented in the XO's Operating System. It sounds restrictive but sensible, and as long as the option is there for advanced users to tweak things it might be a viable system for other operating systems as well.