I already have a bookstore section on my main web site, based on Amazon. It uses a Kylix web services client (based on REST), activated every hour by a cron script. Interesting example, but hard to set up and maintain.
Over the last few days I've used the new Amazon aStore engine to create another bookstore on this blog site. All I had to do was come up with categories, add descriptions, and pick a few books for each category. Everything is set up by a nice AJAX-driven user interface, very easy to use. No programming involved. All you have to do is to add a link to an iFrame (or similar) hosted on your site.
Now not only you can see a set of books, with plenty of details, but you can also buy them without leaving my web site, making it a different experience from the classic amazon navigation. At least, the UI is less cluttered. While Amazon keep suggesting too many things you'll never care about, my aStore provides fewer marketing links (and I could even reduce them further). So, have a look and let me know if you like it.