2011 Census Data Released! Data Nerds Rejoice!
It doesn't matter what kind of planning you're doing in Australia, you're still going to need some good data. And the best cold data is Census.
It's wide ranging, incredibly accurate thanks to the sample size, and collated and organised by the best data nerds in the business, the mighty ABS. So whatever you're doing, get the good stuff here:
The super executive summary: we are still growing, we are still sprawling, everything costs more, and less and less believe are religious. Read some media analysis of the data here, here and here.
Or for more fun, have Shaun Micallef explain the Census to you here.