The big four (?) banks in Australia seem to not be affected. I'm fairly sure they run IIS, anyway.
The largest Australian bank (commbank) was reporting as vulnerable on filippo.io/Heartbleed/ for some hours after the vulnerability became known. GE Money Australia haven't fixed their vulnerability yet either.
Ah, I thought commbank was on IIS. I checked it when I posted that message and it came up green.
My bank (PC Financial) has been offline all evening. I wonder if it's related.