In 2012 I thought it was a good sign, but since then, almost 2 years passed with no other information.
In June 2012, my colleague from Human Resources told me that someone from Australian Embassy called her and asked details about my job (duties, how many working hours/week, if I get paid). Immediately I logged into my online account and saw the change of status which occurred 2 weeks before that call.
Normally, I would say that it was a CO allocated. But after all this time, I have no idea what it was. I might be in security checks which I've heard could take up to 18 months (I am from high risk country). Still, it's 22 months...