olpc | sugar
The One Laptop Per Child project is an incredible idea. Design and build a laptop for under $100, and send it out to the third world. I’ve been intermittently following the project for a few years. As of now, the hardware has been made, and beta units of the XO are being shipped.

It’s incredibly interesting from a design perspecitve - from the ruggedisation (no HDD!), mesh networking to the user interface.