This is in no way a complete list, but films using the Sony hi-def 24p camera used for OUATIM:
Star Wars Episode II: Attack of the Clones Star Wars Episode I: The Phantom Menace (just the scene on the balcony where Qui-gon tests Anakin's blood) Vidocq (French) The Truth about Charlie (night scenes only) How High Session 9 Spy Kids 2: Island of Lost Dreams Spy Kids 3-D: Game Over (3-D high def) Step into Liquid (interviews only) Ghosts of the Abyss (3-D high def) The Long and Short of It (Sean Astin's short film, on the 2-disc Two Towers DVD)
Coming soon: Star Wars Episode III Collateral Sky Captain and the World of Tomorrow Casshern (Japanese)
TV Shows: Boomtown Star Trek: Enterprise Earth: Final Conflict The Education of Max Bickford
There are also countless independent and even a few studio films that are shot using standard-definition digital video cameras like the kind you can get at Best Buy. In addition to the previously mentioned Anniversary Party, some others include:
28 Days Later Dancer in the Dark The Idiots The King is Alive Pieces of April Personal Velocity Timecode Hotel Bamboozled
The groundbreaking Russian Ark was filmed entirely in one long, 90 minute take and this was only achievable using a digital camera (film reels only last eight minutes). Isn't the FX show The Shield filmed with a digital camera of some sort?
Sean...you may be right about Cast Away. But I thought I remembered Zemeckis (on the commentary track) mentioning something about this being the first movie he shot entirely in digital.