Here are some figures for you....

Rent (1 bed flat) - $2500/month
Food (for 2. No booze) - $180-220/week
Electricity - $600/Qtr
Natural Gas - $70/Qtr
Cell phone (2 on a linked plan) - $160/month
Car Insurance - $1200/Yr
Car Registration - $1000/Yr
Internet - $100/Month for cr@ppy ADSL
2 tickets to see a film - $50

Also, they're going to be brining guys over on a 457 visa and the Premier of New South Wales has said he's going to be getting rid of the tax break that you get on this visa, within the next couple of months.