I have some 12oz black denim just waiting to get cut up.
This was a whole spread on the 6 types of cool jeans for Right Now.
This page talks all about how they shoot the denim with BB guns, bleach it, drill it, slice it, etc.
#3 was interesting. They show a pair of jeans that is heat-welded and use no stitches. They are a steal at $345. Yikes.