Zero Point is the first 3D short movie (20 minutes) released specifically targeting the Oculus Rift.
Not only is the movie shot for the Oculus Rift it is even about the Oculus Rift. The film is not going to rate high as a movie but the camera work is pretty cool. It is a mix of wide-angle video, 360-degree panoramas, and fully spherical shots from places like the Golden Gate Bridge and the Electronic Entertainment Expo (E3)
There is a brief demo available to try it before you buy. The last scene with the Buffalo is pretty neat.
The film is available to anyone with a PC, an Oculus Rift, and $11.99 (Until November 3rd) and available from Steam.
NOTE: No special viewer needed, goes direct to rift. Very easy!
Here is a preview of the film.