Below is a fix for those who upgraded to iOS 6 and haven’t been able to get the passbook app to connect to the itunes app store. Luckly there is a easy but strange fix.
First go to Settings > Date & Time
Turn off “Set Automatically”
Go to “Set Date & Time”
Change the month to January
Open the passbook app and click the app store button. The apps should load now.
Then go back to Date & Time and turn back on the “Set Automatically” button.
Go back to passbook and everything should still be working. Now if only it was a more useful app right now but I’m sure it will get there. Baby steps to the future.