Thought this would be worthy as a deal post. If not, please report to move to forums.
If you haven't renewed your passport and don't have time to go to post office by tomorrow, you can avoid the passport fee increase on 1st July by submitting your online application and they will honour the old fee for 28 days from application. The fee has to be paid at an Australia post outlet.
There is no mention on website by I called them to confirm.
It seems like the fee is only going up ~$27 to $373.25. but the same sources say the current price is $325, when it's really $346.
No point getting a passport too early for an 8% saving.