Via the Cathay Pacific iOS ap? Its never pushed anything to me. If I put my boarding pass into passbook before the gate is assigned, it remains unassigned on the boarding pass, forever. Likewise if there is a gate change, it never updates. I believe the technology is there to do it, but it is either not supported by Cathay or not working.

I concur, the Hong Kong airport ap works a treat, well done to them (at least for the push notifications, the ap design is very so-so). Too bad only 50% of my flights originate in Hong Kong!