Mythbuntu 7.10 hits 20,000 downloads in one week
 

Mythbuntu is an Ubuntu derivative focused upon setting up a standalone MythTV system similar to Knoppmyth or Mythdora. You can install it either as a stand alone Frontend, Backend, or combination machines. It is also easy to convert any Ed/K/Ubuntu machine into a Mythbuntu machine via the mythbuntu meta packages.

http://www.mythbuntu.org/