I have a service with Aussie broadband, and I'm participating in the IPv6 beta. It's being activity worked on. The staff are highly communicative with those in the beta. It's been great so far.
Aussie Broadband seem to be the only ISP that puts any effort in and cares about their customers, I hope they don't get bought and become another part of TPG
They've stuffed up my billing every month for 12 months now. I've told them numerous times and they still can't fix whatever problem they have.
I'm glad other people are having more luck with them.