Plus Griffith university.
Been reading your thread but not sure if I can help. I am a teacher in Brisbane. You are right about the shortage of jobs in public schools, and private. However I will say that if you can secure a position on internships/Pracs in a private independent school and you are really good then you won't have trouble. There is a shortage of great teachers!!!
I have been told also the grad diploma course is going to be gone soon too.
If you wanting to apply yes you need to go through qtac. You don't need to worry about an OP for mature age entry with a previous bachelors degree or higher. After the 2013 intake (offers are done by late jan etc) then you could contact qtac and get the course guides. It's a pretty thick book but it will tell you everything you need to know applying for entry for 2014. Possibly you could apply midway through 2013 and avoid qtac??? Contact admissions at the university and they should be able to help you.
Well that's what I understand happens... But I could be wrong!!! Good luck!!