That sounds great! I would be more than happy to use your guide and provide feedback. I am well versed in WindowsXP and am using the latest Ubuntu version of Linux on a laptop and can navigate around pretty well with that. While I am no tech genius, I do know my way around a computer.
I saw that there were some complete systems except for the AMD processor and RAM recommended on the Wiki. Those were manufactured by MSI and available at NewEgg. However, they have been discontinued.
Do you recommend a system like that, or building one from the bottom up?
I would like to begin working with LinuxMCE soon, so let me know when you get your guide completed.