I tried to hook up my C2D MBP running OS10.4 to a Panasonic PTL500u 720p projector via DVD. I played a 720p and 1080i Quicktime clip and the video looked only slightly better than a standard def DVD. Also the image didn't fill the screen completely. Text was blurred and not easy to read -- not very HD looking. I tried both mirroring and spanning. The highest resolution it would connect was 1440 x 900 interlaced, however it did NOT look that good. In fact, I tried a 540p clip and could see no difference between that and the 720p clip. What's going on? I'd like to be able to save 1080/30fps Quicktime videos and play them back via DVI out rather than get an AppleTV and be stuck with 540p.