The competition for the OLPC computer is getting quite hot – which is probably a good thing.
The Nicholas Negraponte machine is called the XO and details are coming through now that the first units are shipping reasonably well.
This BBC article starts to go into some depth. In particular the screen works well in direct sunlight, the device is showerproof and battery life can be extended by using a black and white mode (selectable from the keyboard). Although the keyboard is rubbery (fank you velly much) apparently is is cuite responsive to the touch. Evaluation units have been getting good reviews.
The XO is capable of networking with other machines without any network infrastructure but I have yet to find details of how effective this is.