The DvdReview web page has a rather comprehensive list consisting of Anamorphic, Pan & Scan, THX, Commentary, Layer Change, Flipper, DTS, DD EX, Problem Discs, Discontinued discs. I am not aware how current it is, but its a start.
DVD Review Film Vault
I have converged all the screen modes on my 40H80 with the Toshiba grids. The picture looks fantastic with DVD as well some DBS content. Anyways, I noticed the other day while watching an anamorphic dvd (I do not recall the title) that if I put the tv in Theater Wide 1 I was able to see more of...