To the Boards HArry_UK, always great to have a new memmber, pull up a chair and enjoy!!!
To answer your questions:
1. You will most likley need to have a return ticket, or a ticket that shows you will be leaving the country by the time 1 year has passed, so you do not have to be going back to the UK, just anywhere but OZ.
2. No, the overdraft limit does not count, that is considered debt. If you spend your 2000P and start to use your over draft to support your self, you are in trouble!! You will need the required amount of funds in your account.
3. I was there in the winter and it seemed to rain alot??? The news said one day there was more rain than in the last 50 years??? So just be prepared, you should be ok with the wet suit :D . But Cliffo with have more to tell ya about that, he has got the first hand knowledge on Australia!!!
Hope that helps dude!!!