I started a thread on the old forum about this just after it came out, and got a few people interested. I heard theyre remaking it in Hollywood so I urge you to see the original before they ruin it and sanitise it because YOU KNOW they will. This was the best film of 2003/4 and didnt win a truckload of prizes for nothing. The DVD is well worth buying. You can get the 2DVD version at BlahDVD in the UK for £7.99, though there's a 3 disc version floating about.
More info
here.