Mythbuntu, the Windows Media Centre alternative is an Ubuntu based Linux distribution that is dedicated to media. You can watch video and record live TV (with the help of a TV tuner), listen to music, or browse pictures. It is simply an all-in-one PC and entertainment centre.
Mythbuntu is practically the core of Ubuntu without all the extra applications included in Ubuntu. It ships with the XFCE4 lightweight desktop, that can be easily replaced at any time with one of the Buntus desktop (Ubuntu,Kubuntu or Xubuntu) using the Mythbuntu Control Centre.
Mythbuntu is recognized as a community supported project by Canonical, it’s development cycle closely follows that of Ubuntu, thus, it is released every six months shortly after Ubuntu releases. The recent release, Mythbuntu 7.10, is now downloadable as an .ISO that burns into a LiveCD. The LiveCD works as a MythTV front-end.