I never got an answer/reply from anyone, so I figured maybe nobody knew the answer. However, I finally did get an answer from Onkyo that I thought might help someone else. I have an TX-NR807, iPOD Classic 120G (video), and the UP-A1. My problem was the OSD only showed the iPOD "Music" submenu (no "Videos", "Photos", etc.), so I could never get videos on my screen (connected via HDMI).
Here was their solution:
"Sorry for the delay in responding to your e-mail inquiry about the TX-NR807 and the UP-A1 iPod dock. In order to show the current song playing from the iPod to the TV you need to press and hold the Display button on the remote for the TX-NR807 to turn the OSD menu on and you will than be able to see the iPod information on the TV screen. To display the videos from the iPod press the Display button again to turn the OSD off for the dock."
So, it actually does work. You can't use the OSD to navigate to videos, which is stupid IMO, but when you press Display it returns control to the iPOD. Then you can manually find the video you want and play it. The remote control does still control navigation, but I can't see the iPOD display from across the room, so I still have to go over to the console. Oh well!
Hope that helps someone else!