I use this with worldTV and found it to work pretty well as long as you don't change the volume. Once you try changing the volume, it crashes and you get the green screen of death. I find it useful for watching major network world news. I don't know of any other TV apps that are available. -still waiting for HAVA TV though.

Great frontend for Mplayer. It looks so nice (buttons slider and osd) compared to the built inn M5 thing.