The LA Times has a couple of articles about new trends in denim.

Wearing Denim-on-denim (aka doubledenim) is now allowed.
http://www.latimes.com/features/image/la-ig-wash-20100822,0,4372356.story
 
The video gives insights on fashion photography.

Expect to see denim in other colours.
http://www.latimes.com/features/image/la-ig-magic-20100822,0,7113387.story
When I saw that headline I thought it might mean that we might start seeing things like the persimmon dyed, mud dyed and tea dyed denim that the Japanese have been using, but it seems like it’s just fashion designers trying to break the mould and BE DIFFERENT which is their constant mission.

There is a nice denim mini-primer:

Denim, as it’s usually understood, is a durable, cotton twill fabric with an indigo-dyed warp or top yarn and a white weft or bottom yarn (which is why, if you turn up the cuff on a pair of jeans, the inside has a noticeably lighter cast). The relatively coarse traditional 3×1 weave (which means the thread crosses over three perpendicular strands before going under one) gives denim its durability and familiar ribbed texture.