Also well worth checking out: Terence Blake's post at Xenoswarm on the same documentary from last year. In his post Blake discusses the extraordinary ambition and passion that Alejandro Jodorwosky displayed for his visionary attempt to film Dune, which is what makes the documentary as compelling as it is.
It is standard for artists to talk about their devotion to their work--and often they merely seem blandly pious in doing so, and we take it as just that, bland piety of the type that is simply grist to the PR mill. When Jodorowsky speaks about the same issue in the documentary--when he declares that he was ready to die for his vision, when he recounts his approach to Pink Floyd (who were to make much of the music for the film) and his insistence to them of the world-historic importance of his project--one takes him much more seriously than that. One believes that he believes, and doubtless it is a reason why so many uncritically accept the claims for the project as not just a missed opportunity, but a missed turning point in the history of cinema--and even as one unconvinced of these claims, I find myself regretting that the kind of ambition and passion he displayed is such a rarity.
Jodorowsky's Unrealized Dune: A Critical View
Preview Star Wars in Context