I've had some sucess with Myth, sage and linux mce (XBMC doesnt have a tuner component yet - that I'm aware of). The big downside to linux (sorry.. not meant to be a linux bash).. is again support for HD content. All the DRM and support for normal digital cable doesnt exist, and its not ever going to from what I've seen. If microsoft has had trouble getting DTV and cable cards to open up (the little that they have) I can't even begin to imagine how an 'open' platform like linux is going to fare. Once everyone moved to HD and eventually bluyray and IPTV I see some serious limitations on the linux platform. Its not really a linux issue.. its really a content provider problem, and unfortunately we're all using HTPC's to watch the content :-) Anyone sucessfully using an alternative (nix based) mediacenter with HD and blueray/HDDVD?