I too talked to an engineer at SA, and he left things with TWC and their unwillingness/inability to update firmware.
I actually have another hdmi issue: I assume that after using component from settop to AVR-2807, that one can use hdmi from the receiver to the television, and from the DVD to the receiver. The problem is that it won't work for me. I usually can't get anything at all, sometimes I get the video, but never the sound.
I just purchased the Denon 2910 DVD too. I was able to get the video via HDMI, but to tell you the truth, I thought the component was better, at least when I could get the component to work. Do those cables go bad easily? I should sit down with the instructions first (duh) but so far things are not working well.
I'm finally getting used to the receiver. I don't like the instruction book, but once I got the hang of it the receiver was easy to use. This is the first receiver where I have had to do so much programming.
Once I got things working, though, oh my! This is my first HD and 5.1 sound, and the Pelenor Fields battle in LOTR is pretty cool, both on my new 50" panny, and through my Polk speakers.
AVS: Where everything you write will be used against you.