Re: MythTV VS. Apple TV VS. Vista Media Center
Apple TV - no TV recording whatsoever, doesn't work with things like Vongo, basically an interface to play your own media on TV. (No HD/BD support, at least in hardware, far as I know)
Vista - just an upgrade of XP MCE, by and large the same thing, full HD support, hardware varies (obviously). Full support for Vongo, MovieLink and the others.
Myth TV - basically a free version of TiVo. It has pretty much all the same features. Won't support Vongo and others (obviously). Not sure about HD support.
Since I get asked alot, I am originally from Ukraine but am Russian by nationality. My nick means specter in Russian.