The shopping carts on our Gallery site should now be fixed. Since upgrading gallery about a month ago, the cart software had a fit and decided to not work anymore. I've applied the necessary patches and corrected the caching issues. This means that you should once again be able to generate downloadable zip-files and submit orders for photo CDs using the "Add Photo to Cart" option in the gallery.
In addition to that, we've begun reviewing some printing services and started testing some mechanisms by which you can purchase prints directly from the photos in the gallery (so don't mind any options you discover that say "test" on them). Stay tuned for further developments in this area!