Browsing through the archives I found a lot of people confused on setting up XF86Config modelines for interlaced, 480p/720p/960i/1080i, etc timings. I've been experimenting (with luck!) but lack an actual HDTV to test these on. If you have a current home theater setup (HDTV or projector) and are trying to integrate Linux I think we can help each other. PM me with your hardware if you are interested.