JIm Cehung is one hell of a comic book artist, during the past 2 years he is the guy behind The Avengers comics. Having a good taste for composition and scene concept, Jim can make some extremely detailed and clean lines, check it out.

I could not find Jim Cheung official website or blog, so if any of you guys know it, please post it on the comments. Anyway, you can still find more information about him at Wikipedia and a lot of artworks at his Comic Book Art Community profile.