Medibuntu repository now supports Ubuntu 11.10. Medibuntu (Multimedia, Entertainment & Distractions In Ubuntu) is a repository of packages that cannot be included into the Ubuntu distribution for legal reasons, copyright, license and patents (e.g. advanced DVD playback support, multimedia codecs etc.)
sudo apt-get install app-install-data-medibuntu apport-hooks-medibuntu
For more info visit official Medibuntu Website.