I have a new 5G iPod - Black. (I LOVE IT!) but....
I copied some SNL skits to my iPod and although I set them to "TV Show" in the "Options" tab in the iTunes Get Info window. I also tried categorizing them in "TV Show" genre with no luck. The only TV show that actually shows up correctly in my iPod is the second season of The Office (which was purchased via iTunes).
What could I possibly be doing wrong for these files not to show up under "TV Shows".... although they DO show up in a video Playlist... so for now, I've set up a Playlist called "Other TV Shows"... Kinda a weird workaround for something that should just appear in the "TV Show" section of the video section.