Mac OSx86

Apple TV has been hacked to play anything like divx, xvid, …
A modded Apple TV HD image is floating around on some torrent site.

“This is a slightly-modded AppleTV dmg file of all three partitions,
for use when you screw up your own modding – you can restore to this one.
It has a startup script disabling the firewall, with ARD and sshd running.
(ssh -1 frontrow@your.appletv.ip, password frontrow). It’s pre-set for 720p.”

The other interesting thing is that Apple TV runs on common hardware Pentium M,
Intel 945G, Geforce Go 7300. And it might run some form of OS X (possibly 10.5).

Update: The image appears to be a modded 10.4.7 with some of the 10.4.9 kexts.

Upgrade your Apple TV hardrive for a bigger one here