Audio demos:
Serenity (opening credits)
War of the Worlds (DTS) (low-flying jets/field battle sequence)
Lord of the Rings, Return of the King (DD-EX)
Gladiator (DTS-ES) (opening battle sequence)
Saving Private Ryan (opening scene)

Animated category (audio/visual):
The Incredibles (DTS-ES)
Cars
Monsters Inc.

Concert category:
Pink Floyd: Pulse

Indie/Low-budget/Oddball category:
Primer