Not sure whether this had already been mentioned, but I noticed today that those with Gold status now can take 2 x 32kg instead of the previous 2 x 23kg, domestically. So now it's equivalent to Platinum and better than QP. 
From the Qantas site when you try doing a booking...
"For Gold Frequent FlyersFrom 10 September 2012, the checked baggage allowance for Gold Frequent Flyers travelling on Qantas domestic services will move from 2 x 23kg bags to 2 x 32kg bags"

From the Qantas site when you try doing a booking...
"For Gold Frequent FlyersFrom 10 September 2012, the checked baggage allowance for Gold Frequent Flyers travelling on Qantas domestic services will move from 2 x 23kg bags to 2 x 32kg bags"