Now I want to comment on
http://www.mississippi-photo-gallery.com/
WOW!
From the first page load, I was struck by your site. You really have a prime example of "simple elegance" here.
The whole feel of your site is simplicity, and the effect was pulled off really well. Thin, plain lines. Short menu. Plain image descriptions with amazing headlines for the images. The gradient in the upper right of your title serves to accent the simplicity, rather than draw from it.
The entire effect serves to showcase the photos themselves, not the site. The abundance of white draws attention to the colorful photos. The fact that there are only four photos per page ensures that the viewer is not sensory-flooded by massive amounts of images.
I've really only got two suggestions for this page. I'd make the image above the menu a different one for each page, preferably not one already repeated in the images for sale of that page. That would help inspire customer curiosity and give better exposure of your work. The other refers to theft, and really matters only if you are concerned about thieves. I'd add some kind of copyright or sample notice to the full sized images, to make it difficult for someone to just copy the photo and use it elsewhere. As distasteful as it is, the most effective method that I can think of is to place it in the center of the photo. That way thieves cannot just slice the edge off with the notice.
Also, whoever shot those photos has some excellent taste!