A couple of days ago I mentioned that developer FernetMenta is working very hard on XBMC versions which features Xvba (X-Video Bitstream Acceleration) support. Xvba allows faster hardware acceleration on AMD (Fusion) systems. I modified the XBMCbuntu version in order to fully support Xvba. The packages from this repository are used: https://launchpad.net/~wsnipex/+archive/xbmc-xvba as well the very latest AMD Fusion fglrx 920 drivers from this repo: https://launchpad.net/~xorg-edgers/+archive/ppa. Use unetbootin for the best experience.
This release has been exclusively tested on my Zotac nano ad10. All drivers should work out of the box and playback at 1080p should be fine!