I have an OLPC XO, and they are an amazing machine for children in under-developed countries:
- Built-in camera & microphone
- Oscilloscope app
- Special O/S that goes dormant and uses minimum power when idle, to maximize battery life
- Can be charged with primitive generators and manual labour
- Networked
Brilliant design. Too bad too many governments never understood this and thought a PC or Apple laptop were the same thing.