Why not allow for images to be included/excluded in the Products area based upon a CSS class?
Problem: Right now, the only way to limit what photos are given the toolbar is by size, or by expressly choosing "Not for Sale" in the control panel. This seems like a lot of work, when I might want to post an image that illustrates a point in a blog post, but is not for sale.
All I would need to do is add class="fotomoto" to any photo I want to sell, and boom, it's ready.
Alternately, have it NOT include images with class="nofotomoto".