A working model of the $100 laptop has been shown, and here is an eWeek preview.  This project is looking to provide low cost computing for education in developing countries.  It will be interesting to see how it plays out here in North America too.

(http://www.eweek.com/slideshow_viewer/0,1205,l=&s=25951&a=205057&po=1,00.asp?p=y&?kc=EWEWEMNL041307EP38A)