Steven Campbell, a friend of mine online, has released a photoblogger focused WordPress theme called PhotoWP.
It is a one column theme created just to display images, and comments on those images. It is lightweight, not requiring any images, other than the ones you want to display. This makes it easy to manipulate into any color set you like.
Check out PhotoWP. I think its one of the best photoblogging themes for WordPress I have seen yet.