Upgrade time - started years ago
I'm dual-stacked at home - thanks to a tunnel into Hurricane Electric's free TunnelBroker, no thanks to Virgin Media, who seem to dismiss any customer enquiries about IPv6 support with "IPwhat?"
It's going to be a very long transition on current plans, though: the servers all need IPv4 addresses until everyone has migrated, and the clients all need IPv4 addresses too unless you rely on the DNS64/NAT64 hack, which breaks DNSSEC. Really, IPv6 needs a better migration strategy than it has right now.
I'm pleasantly surprised at Telstra making this move - did they really have customers demanding it, as opposed to a handful of geeks rebuking them for not doing it yet? As it stands, the "you must implement IPv6 because ..." is rather lacking in good endings.
@James Woods: valid points in a sense, though we can track an IPv6 address in much the same way we can an IPv4 one - you track 2001:0DB8:beef:cafe::/64 just the same way you would 198.51.100.0/24 (and indeed both are assigned to the same entity in this case). Your post brought back depressing memories of being assured on Slashdot that we must all rush to adopt IPv6 immediately, because it's virus and spam proof thanks to implementing the record route feature (which IPv4 also has) which, I was told, prevents TCP spoofing...