The new film by John Cameron Mitchell (AKA Hedwig, from Hedwig and the Angry Inch).
It's an x-rated drama / comedy, with tons of real , unsimulated, incredibly graphic sex scenes. The simple fact is, it's not really a porn film, as the sex is kind of integral to the story.
Any attempt to censor the film would completely destroy it, but as it stands, it's one of the most earnest and frank portrayals of human sexuality I've ever seen.
Also makes me wish we had a shortbus club where I live =)