Cabin Secure you've stated the official line very succinctly, however, the official line was established pre SARS and we all know how 'fluid', to borrow a management phrase, the current situation is.
Do the likes of you or I know what is going to happen? No, not even management and the unions know, for now. Maybe QF crew will be seconded, maybe they won't. Bet your bottom dollar thats what the FAAA will push for prior to the company moving to CR for mainline crew and before AO recruit off the street. Same same for Impulse.
Best advice to all prospective punters, keep your documentation up to date, your interview techniques polished and a bag packed and ready to go at a moments notice. Nobody knows with any certainty how this will play out, except for Cabin Secure it would seem.