So once you have your MythTV setup and connected to your TV, how do you continue to manage it with just a remote control? Well there are lots of options. There is the obvious solutions like VNC. VNC is nice, but it can be cumbersome, even on a local network segment.

But for things that don't require a "desktop" I like to use X over SSH. It's faster and more responsive than VNC. One of my favorites is when I have to run mythtv-setup. It works great using ssh. To run it remotely from my Mythtv I run the following

ssh user@mythtvbox -CX mythtv-setup

The "-C" turns on compression, which generally speeds things up. The "X" tells ssh to forward an X Windows session for the app to your desktop. It works really nicely. 

You can even do this with the mythfrontend as well. Its just faster if you have some configuring to do than to run around and plug in a mouse and keyboard and sit on the floor 3 feet in front of your 50' LCD TV. But don't expect to be able to stream video that way! :)