I was curious about how many Wazers we have here in Aus...

My best guess is a little under 30k.

I'm basing that on the following -

I went to Warrior in May at close to position 2600, I've just gone to Knight at position 1179
With Knight threshold at 4% of the national userbase that would make the total number 29,475 (with a small margin of error) with a growth rate of a little over 3000 users since the begging of May.

Does that sound about right?