Sabayon Linux is a heavily modified derivate of Gentoo created by lxnay dEsigN. Version 5.1 comes with Gnome 2.26 or KDE 4.3, Kernel 2.6.31, EXT4 filesystem, OpenOffice.org 3.1, XBMC 9.04.1, and the 3D desktop configured to run on boot. These DVDs are bootable and installable from an icon on the desktop.
Along with the standard editions, there is also a Gaming DVD. The gaming DVD is based on the x86 Gnome DVD, and includes tons of games!