As for Blizzard, they have stated that they do support IPv6, and even emailed me for a tcpdump. They then ignored me again and again! They have changed things which has removed the delay as they now send a firewall response to the IPv6, so still broken. Oddly the first reaction to my blog on the IPv6 mailing list was :-
The good old "lets make a uninformed news article to force them to do something that nobody cares about" post. I don't see any signal there.
Which is odd, as I did not consider myself "uninformed" on this at all. Also odd, as on the IPv6 mailing list where Blizzard announced the IPv6 support originally you would think it was not something "nobody cares about" either. Oh well.