This is sort of off the top of my head, but I was surprised by the way the AA Passbook integration worked. It might be more fluid if you could create a one time AA card in Passbook with your general account information. Once you checked in (which would be great it you could do this from Passbook) your mobile boarding passes were automatically added to your AA card already in passbook. These could stay here till some specified time after your flight then automatically archive. What do you all think about the way the new passbook app works? Am I off base? Are there any other features you would like to see?