Hi Jess,
I am a fellow AUT graduate and moved straight over to practice in Oz after finishing my degree. I am happy to answer any questions you have. It's a painless process to transfer your registration over to Australian. You will find trying to work further abroad than Oz in your first year out difficult. Sounds like you have the travellers itch? Nice part about oz is that you can try different states where practices can be quite different. Unfortunately the physio's from my year who tried the UK with no experience came back with their tales between their legs. It is getting more and more rediculous to get a "good" job over there and the employers are having a field day offering less and less support and education opportunities because of the high demand for jobs. Private practice over here is also an option for new grads but be wary of the pitfalls, most run on commission, so if your slow or like a chat your bank account will pay. Also you have to pay insurance which is a hefty yearly fee on top of registrations, memberships etc.
If you need any other help please post another reply and I'll give you my email address.