DR Michael Shayne, all of the STAR WARS films are in 6.1 (EX or ES depending on whether you're listening to Dolby Digital or DTS sound). Pixar/Disney's TOY STORY 2 and the last three Pixar movies: MONSTERS, INC, FINDING NEMO, THE INCREDIBLES.
And I'll tell you a little secret: many of the most recent regular 5.1 Dolby DIgital DVDs will translate just fine into 6.1 if you activate 6.1 EX decoding. You have to do this manually (on my Pioneer receiver, it requires only the push of one button on the front panel), but it will work. On older films with DD soundtracks, it doesn't work, and the surround track collapses into the center back only, but for anything made since 2000, it should work just fine.