Actually, the cost is US$ 25, a lot less than the OLPC and it has just two connector, one HDMI and one USB.
Here is the picture of the $25 PC:

And now the same connected to a screen and a keyboard…

This computer, created by David Braben a game developper, once mass-produced could provide a computer to any student around the World.
The computer runs Linux, has a 700 Mhz ARM processor, 128 MB of memory on an embedded SD card and displays decent graphics with OpenGL 2.
- Raspberry Pi Fundation will distribute this computer.