I just finished the first pass on an Amazon store for one of my sites:
http://www.discusscareers.com/amazon_store.php
I'm going to be adding functionality to allow selection of different categories (only ones that I define, though), different sorts, and the ability to add to your Amazon cart right from that page.
Have a look, let me know what you think!
The more I hack on vB, the easier it is... ;-)