Anyone heard of Plex Media Center for OS X before? Looks pretty sexy... the only thing that these are all missing are support for decoder cards (a la MythTV) or something to auto-torrent download to give the impression of recording TV. MythTV is kinda old and busted looking and in terms of some of the features (especially compared to the new sexiness that these media center apps have), but it will record TV which none of the other systems do (for the most part).
I want it all dammit! In the form factor of a mac mini. And a pony!