Well, I assume that by the time I finally get the hardware to do this on there will be some form of packages for Fiesty (If not, I guess I'm building from source). And Kubuntu is basically just Ubuntu minus Gnome. And if Linux MCE uses it's own window manager and such I don't think I'll have any problems. Plus apt can download any needed packages that are not in Kubuntu by default from the repos.

Well, I actually haven't built this computer yet. But when I build it I'll set it up and, if I succeed, write a wiki page about it. Also, I wonder if I could enable the composite extensions on both x servers, so that I can have AIGLX or XGL on my monitor with beryl and the U2 interface on my TV...

If I installed Kubuntu Fiesty Fawn (the beta anyway) on a PC that has plenty of storage space and a GeForce 8800GTS. Would I be able to plug a monitor into the DVI port, and always have a normal KDM logon and KDE with my normal user account come up on that. But have at boot time a separate account log on automatically and display on the TV-Out port to my TV and have that act as a Hybrid server. So that theoretically, someone could operate the computer normally on the monitor (though the DVI port) with keyboard and mouse and the like, and someone else watch a recorded TV program on a TV connected to the TV-Out port?