I was just browsing freshmeat and came across Movix, a mirco linux distro (~7MB) that can be burnt onto a CD together with your favourite divx movie and has enough software onboard (well, mainly mplayer) to boot into a linux system off that CD and play the movie.
It comes in various flavours: movix, emovix and movix^2
I hesitate to put this in the cool software thread because I haven't tried it yet and don't know how well it works. But it looks interesting anyways.
Anybody tried it yet?