I have the same interest as Speakparrot, and was searching for the same thing. If any media products are in the shopping cart, then USPS media postal rates would apply for that/those items. That would be GRRREATT! We are just about ready to go live and offer a mixed bag of products. We are about to upgrade 3.8 to 3.8a and then make sure of all settings. I have found this to be a delightful experience in setting up and am satisfied 100 % with everything except the shipping options! Good job, gang!