Ok.. so you have your backend all setup and recording TV :D
But what if I want Mythtv in another room?
No problem!

Hardware:
Acer Revo 230: (Aspire R3600)

Intel Atom 1.6 (Hyperthreading)
1Gb RAM
160Gb WD HDD
Nvidia HDMI

Setup:
Install Gentoo and MythTV as directed in the installation guide.  Then just point the front end to the back end.
On my setup, I omitted Mytharchive, Mythweb.

Todo:
Setup Storage Directory on backend for frontend to use.