I have a amazon wordpress plugin which let you select different products from amazon and make a comparison table for you. You can check out the video demo here: [url removed, login to view] I also attached an image to show how the result page look like.
The problem is I need to select each products one by one. I want to modify the plugin, so that I can put some shortcode e.g. [amazontable keywords="handheld gps" num="3" browsenode="1234567890"] and your script will dynamic generated the comparison table.