Both wife and I applied together. When we looked for availability on Sep 2nd, there were no appointments available at all. I've been constantly monitoring availability throughout the weekend. A couple of slots opened up, one in November and one on Sep 10th. I grabbed them but still kept looking. Finally, a whole bunch of slots opened up for Sep 7th on the day before and I was able to pick the same timeslot for both of us.

During the interview, the officer mentioned that he'd opened up quite a few slots for the next few days. Apparently, they were all taken up already. He hinted that they may open up more slots since the demand is very high.

If you are based in AUS or are looking for appointments there, don't give up yet. Keep checking for slots to open up.