For people who are interested, just wanted to give some quick thoughts on the DVD release. If you thought the movie was good, the DVD is a nice transfer with very good sound. Personally, the look is what I liked most about the film. Haven't heard the commentary track yet, so I can't comment on that.
Extras: Boring crap. Don't watch the music video if you haven't seen the movie - the video is the whole movie condensed into about 5 minutes. The "Making of" is stupid (Be careful, diseases may be coming after you...or you...or YOU!). Worst of all, the prominantly displayed 3 alternate endings is a lie. You get the movie ending, the "bad" ending, which is essentially the same, and the added footage intended to follow the bad ending which makes it even more like the first ending.
Caustic and Recluse bring up very good points about this film. It certainly had its major flaws, especially in the last third. Still, I enjoyed the movie enough to buy it, but if you are considering buying it for the extras or the alternate endings, don't.