Here is something i have been working on recently :
Here is the release information/post from the odroid forums :
Arch Linux – LXDE/SLIM//GEDIT/CONKY/CHROMIUM/GSTREAMER/FFMPEG/GLMARK2-ES2/PLANK/XBMC
It has mesa-libgl and odroid-libgl installed side-by-side as well as a patched xorg-server (https://github.com/hreikin/odroid-arch-packages).
You will be able to play 1080p video using ffmpeg which i compiled from this guide : http://forum.odroid.com/viewtopic.php?t=669
XBMC needs running with sudo, but i haven’t run into any problems with it yet, i am working on the permissions issue and will be updating with another rootfs in the next day or so with nfs support enabled in xbmc !