I just successfully price matched at Harvey Norman. Might be possible to combine it with spend $300, get $100 back offer for Amex customers (now expired).
While it's not a massive discount, we all know that there is not much room to move on Apple products.
JB Hi-Fi and Kogan sell it for $579: Source
Apple appear to be selling it for $567.60: Source
Officeworks don't stock them (so can't price beat by 5%).
If you don't have an Amex with offer saved to your card, you could try pre-purchasing gift cards and price matching at JB Hi-Fi using this deal at Coles
For anyone going overseas for Christmas, claim your GST back via TRS