Need help to set up ipod to stream live tv from mythtv or other media server

My goal is to watch live TV  from my mythtv box on my IPod.

My second goal is to play recordings that are in progress.

If I were to compare what I want with an existing product, I would say I am trying to duplicate how Orb works (orb.com). I do not want to run a windows box for my media server, or I would just go with orb.

I have installed mediatomb on the mythtv box and used UPNP clients on my IPod to play the media, which does work to a certain extent, but I have to transcode the original .mpg files to mp4 for the IPod to play it.

This does work, but it takes a long time to transcode the files and it does not allow me to watch live TV , because the IPod cannot play the mpg files that are created when mythv records a program. Orb transcodes on the fly, which seems like what I need in order to get this to work.

I attempted to get this to work via mediatomb, which did not work out. No one has answered my post on their forum, so not sure if I am trying to do something that should work and I have misconfigured, or if what I am trying to do is unsupported. Mythtv has some wiki stuff on it, but most of what I am finding involves scripting that I am not sure work in the release of Mythbuntu 10.04 I am using.

Have tried mvpmc on my IPod, but cannot get that to work either, maybe for lack of understanding.