The Gyrum Amazon Products module allows you to display Amazon products on your website. My main reason for writing this was to have a module that could select products from Amazon by using the keywords that I had already entered in the DNN page settings. Keywords and other settings can be set on a module by moduel basis, or you can add the module to a page in your site and configure it the way you wish (leaving keywords blank) and then having the module display on all pages. Each page will display unique products based on the page-level keywords. If the page happens to not have any keywords, the portal-level keywords will be used instead.
This module is provided free of charge. I hope you find it useful!