1. Costs less than $200
2. Uses little enough electricity that it could be powered by a person. (Like the power yo-yo developed for the OLPC)
3. Can be used in the rain.
4. Folds into a tablet like handheld display.
5. Can survive being hauled to school by children in a 3rd world nation.
I don't think you can find laptop hardware with the capabilities of the OLPC in the private sector for 2x the price. Come to think of it, the give 1 get 1 was actually a good deal. I wish I would have had $400 to take advantage of it.