I'm being using Shozam for my clients's websites for almost 2 years from now. Now its my turn to use it for my website. Its almost finished and I'm using it as test for now. It has integrated beautifully to my site and soon will be able to sell my pics. It won't be used as a primary gallery but as sale tool. Comments, suggestions, etc. are welcome.
http://www.antonio-photography.com/store_beta.htm