I've found a Linux Video4Linux WinTV-PVR-USB2 driver at
http://justiceforall...fr/pvrusb2.html that could possibly make the USB PVR device that Cykiller and Shalax described posible on the Friendtech MCE.
However, this driver was compiled for kernel 2.6 and the latest Xbox kernel is 2.4. There is hope though. First, I was told it wouldn't be very difficult to recompile this driver for a different kernel. Unfortunately, I'm no developer, and I have no idea how one would do this. Secondly, the main problem with the Xbox and kernel 2.6 is the incompatibility of the FATX filesystem. This wouldn't be a problem for MCE as it will run on a native Linux filesystem.
I also wanted to know, could I theoretically install Linux using the MechAssault installation (so I could still play Xbox games), install mythtv-xbox and this driver once it's been recompiled for the 2.4 kernel? I want to make my Xbox a solo PVR (no hook up to another computer), but I still want to play Xbox games. The old saying "You can't eat your cake and have it to" may be appropriate here.*
I hope my ideas help developers create the Xbox-PVR. If they don't, I would like to know why they wouldn't work.
*I really hate that saying. Who the heck just stands around with a piece of cake in their hand? If you have cake, it's inevitable that it will be eaten.