I finally finished putting in a shopping cart for www.livewebshop.com/ , it took me a little time to do. Problem was I was busy with work, and then I wasted time trying to use a php class someone else had created. It was much faster to just develop one myself.
Now that the cart is done, I shall see if I start getting any checkouts. I'm still surprised by the speed at which you can develop with Amazon's Web Services Api. It's beautiful.