LOL, nevermind, it finally came through in an email.
I had registered this morning but didn't receive anything - as soon as I finished the above message it was in my inbox. 
Now I just hope that I can get some genuine savings down the line.
Just in case... You don't actually need the QR code for much, just if you need to pay for postage over the counter, which is generally rare (I have to pay for postage at the PO if sending to Cocos (Keeling) Island, as while the website allows me to go through all the motions of creating a label, and quotes services and prices, it won't let me actually create the label because Cocos (Keeling) Island has too many characters for the field it's supposed to go into (which won't accept any more than 20 characters, from memory), and they won't accept any variation of the name.
I contacted Aus Post about it once, using their live chat feature. I figured I was reporting a bug but the dude was just like, yeah, it won't let you do that (which I clearly already knew 
) but I digress.
AP Business is making me make happy and sad faces on a daily basis now. I paid $7~something for express parcels to local metro areas, which was 
but then (because they don't do discounts on "regional" areas anymore), I had to pay $16.95 for an express 3kg to QLD, which was 
I'm now using eBay labels a lot more, because (big surprise) those in rural areas seem to stock up more at once, so I send more parcels to them and ebay's flat rate is still discounted, so if it's not discounted via AP, I can at least save 75c or more, lol. It'll probably push me down a discount level, eventually, though.
