DR MattH - On a related note... Since you seem to be the techno-audio-video-phile of the bunch...
I mentioned this a couple of days ago... When I was at my friends, Joel and John, place, they had a high definition TV, complete with a Bose home theatre system. I noticed that there was a slight delay between the sound and picture. Is it possible all the processing that the HDTV signal goes through would cause that out-of-synchness?