Yep, I'm Australian.
The applications are currently closed until next year. However, there are new caps that came in this year on the amount of times that you can participate. So from 2015 onward, you can only get the one visa in each category.
If you have done a Working Holiday visa issued prior to 2015 they are letting you do one last one (it doesn't matter if it is your second, third, fourth etc).
At least that is how they ran it this year, fingers crossed that they keep that in for next year too.