Just as with Captain America, there has been a release of concept art of Chris Hemsworth as the Norse god of thunder.
Photos can be found HERE.
Not sure how I feel about the outfit.
Just seems a little to modern for my tastes.
Also, a four minute interview with Chris Hemsworth and Natalie Portman , on the set of the film, can be found HERE.

Looks too rubbery, and the full costume just does not look right, too modern, and I know they are going with a variation of Olivier Coipel's design and all, but yeah, Thor looks better in animation.

I'm not sure I like it based on the conceptual design, but I guess I cannot pass judgment until I see the final product in action.