Read all about the XBMC mediavcentre on their homepage. http://wiki.xbmc.org/index.php?title=Main_Page
XBMC Dharma 10.0 is now officialy in the final version. Live TV, PVR are not yet officlallt supported. If you want to use Live TV anyhow, should use the Repository from Lars Op den Kamp
XBMC 10.0, With PVR, can be installed with the repo of Lars Op den Kamp Repo .
XBMC 10.0, without PVR, can be installed with the official repo of Team XBMC Repo.
XBMC 11.0 PRE, Without PVR, can be installed with the unstable repo of Team XBMC Repo.