Raspberry Pi

I want one of these. It's a tiny little computer that costs $35 and runs Debian Linux. A person needs a power adapter, a USB keyboard and mouse, a compatible monitor (or t.v.), and an SD card bigger than 4 GB to make it all work, so the total cost would be a bit higher.

Of course, I could probably have just as much fun playing with the various old computers I already have lying around the house. The really fun thing would be to find a similar variety of Debian Linux that would run on my existing obsolete machines. But the Raspberry Pi is made by a nonprofit organization with the goal of inspiring kids to do computer programming, so I may eventually decide to get one. Apparently there's quite a waiting list, anyway.  Unfortunately, the hardware is not open source, but it still seems like a cool project.