Bill Knechtel reports finding Elephants Dream on Netflix, appearantly as test content. I can't reproduce this on my Dutch Netflix account, so this is probably region-specific.
I was doing a search on Netflix for "8 1/2" by Frederico Fellini, hoping that I could stream it (they don't have it), when I stumbled across something odd - a bunch of 8 hour versions of Elephant's dream apparently used for testing on Netflix. So I re-searched, this time for "elephant", and saw they have 10 minute, 4 hour, and 8 hour versions of Elephants dream. Very curious! Here's a screenshot.