just saw this. I really liked it a lot; it's definitly one of the most jarring films I've seen in a long time, certainly the most jarring American film I've seen (#1 would probably fall to Irreversible). it's got pretty much the same agenda as Clark's previous film, Kids. also, all the lingering shots on Rachel Miner's breasts and Micheal Pitt's druggy space cadet non-sequitors really delivered.
It's definitely looked at differently once you know it's based on a true story. It's disturbing but overall a decent movie. I owned it, haven't seen it in years, but I do like it.