"Geexbox is a compact Linux distribution designed with the HTPC
(home theater pc) in mind. It's paltry 8.9mb cd footprint makes it
perfect for taking anywhere you want to go. You can even use it at
home for your regular media center if you so desire. It's biggest
claim to fame is that it can play any file at any time anywhere.
You could even, in theory, take it to school with you and watch
videos in class, not that I condone that or anything.
"The OS itself loads quickly, given it's very small footprint,
and does an incredible job of detecting all the hardware on your
system it needs, including TV-out devices..."