DivX is offering one of five movies for registering your Playstation 3 with them.
The movies are as follows:
Ace Ventura (MC: 37)
Batman Begins (MC: 70)
Green Lantern: First Flight (MC: N/A)
Sisterhood of the Traveling Pants (MC: 66)
Two Weeks Notice (MC: 42)
When you're done registering it, you can download the movie and view it on your PC or your PS3. It's as simple as that.