I had to install this on short notice just now since I had an issue with another affiliate script, and only need to use it about a week or so since we're doing an upgrade to 2.1 in the coming week. I noticed it is not affiliating smile.amazon.com links, but is working with all the others. Quick fix:
In this file: ..../library/SolidMean/AmazonParser/BbCode/Formatter/Base.php
Find: $searchdomain = str_replace(array('www.'), '', strtolower($hrefarray['host']));
Replace with: $searchdomain = str_replace(array('www.','smile.'), '', strtolower($hrefarray['host']));