In addition to the previously mentioned Stereoscopic 3D Channel on Vimeo, I was recently made aware of another 3D video mecca: Plasticity director Ryan Suits' Stereo 3D Channel, the first 3D channel on Vimeo and a excellent place to find stereoscopic vids of all types.
From the description:
The Stereo 3D Channel is a home for ALL stereoscopic videos on Vimeo: tests & completed films & tutorials, animation & live action, anaglyph & crossview & pulfrich & chromadepth, and everything in between.
Amazing to see how many people are experimenting with 3D.