When you go to passbook you can click a button to go to the app store and see a list of compatible apps. But, once you add a "pass"into passbook you lose the option to click a button and go to the App Store to see a list of compatible apps. When you try to go to the App Store and search for apps that are compatible with passbook you can't find anything. So I think it is necessary to create a thread listing apps that are compatible with passbook so that we can use it as a reference. Please list apps that are compatible with passbook that you are aware of, that have not been listed yet. Thanks and I hope this helps everybody.