You know the routine, Dizzyheads—another day, ANOTHER OUROBOROS!
Erasing—the ur-source of Ouroboric phenomena—speculates on the possible ouroboric nature of the Alien vs. Predator movies—a film/comics/film rondelay that boosts "vaguely ouroboric" posters to boot.
Scott also links to some terrific Flickr-found ourobori, which perhaps I'll start peppering into the mix over the coming week. For now, here's a YouTube short on the creation of the KITTEN OUROBOROS: