Yup, it's there.
Currently, the Passbook app is not available through the Canadian App Store yet.
(When you open the passbook app and click App Store, an error message appears)
What really odd is I'm on the developer GM (I have my own account thank you) release of iOS6 and when I opened the appstore (8 apps udpated from 12 yesterday), for a brief moment I saw a plethora of supporting airlines/vendors for Passbook. Since I instinctly switched to Updates I cannot track back nor recall where these where listed. I did notice luftsana (I think) airlines and they have their own separate app in the Canadian AppStore.
I REALLY hope iOS6 is a lesson for the entire iOS In-house Apple Developer Engineering team. Do NOT EVER make changes until a) its fully tested for months and bugs ironed out, and b) 3rd party developers are contacted and INVOLVED in the changes every step taking note to their input and insight!!
Maps really is CRAP!
Addresses in AddressBook, addresses in URL/sites in Safari (or other apps) do NOT open in Maps .. but instead in a GMaps page via thier website which sucks squirrel's! I'm VERY angry about the time they had to get flyover working just right and Toronto only got the downtown core updated. It says where I live by Dupont & Landsdowne I'm in the TTC yard!! The official TTC yard is over 7km downtown and on Bathurst and St. Claire!! Arrrgh!