freshdevelopment, your amazon plugin is quite expensive - $97. Not sure if it is worth the value as amazon only pay a small percentage of commission - 4%
We offer a lot for the $97, including lifetime support and lifetime upgrades. We have training, videos, mastermind forum and much more. Some of our members earn over $500 per day ($15k per month) and as you can imagine, that is a great return on investment for $97 software. Also.. we are actually running a WSO at the moment. If you know what that is (hint: search "Fresh Store Builder WSO") you can get Fresh Store Builder for $47
I think it does not support plugins for bloggers. And amazon affiliate investment as wordpress website will increase your site's credibility in the eyes of users
There is an Amazon widget available in blogspot. I used in one of my blogspot blog. It has few fixed sizes and custom size, design (layout, color, font etc.) is not very flexible though.
Also bare in mind that using just a plugin (doesn't matter on which platform) won't help you. If the plugin just copy/paste products, then your site will end into Google duplicate content (like many others) even if you feed your site with amazon products, you will have to enter unique content to avoid Google's wrath
You can use the shopping cart widget for amazon associates. It's compatible with most blog platforms: wordpress, drupal, joomla, weekly etc.