Checkout: ideas

I've been using Checkout for about a year now, and it has worked flawlessly. The one and only thing I could imagine wanting to add to it would be the option to have the print size/quantity selection right on the image page, instead of the one following the "add to cart" link. I have seen this done on several photographer's sites, and it seems to be a little more user friendly. That way, the user could keep browsing after adding the item to the cart.