Australian companies supporting the Passbook ticket manager feature in iOS 6 aren't exactly thick on the ground, so every addition is welcome. Ticketing site Moshtix is adding support for Passbook, meaning you can store your concert tickets on your iPhone rather than having to print a PDF.
Moshtix has previously offered tickets via mobile barcodes, so the addition of Passbook isn't surprising. It would be good to see the top-tier ticket vendors (Ticketek and Ticketmaster) join in, though sadly I suspect we'll still get charged ridiculous booking fees no matter what format our tickets come in. Update: Commenter Andrew points out that Ticketek does support Passbook, though only at venues which already accept SMS ticketing.