As I understand things, IPv6 will be an on-going project for a long time to come. One of the biggest problems is having existing ISPs convert to IPv6, assigning new IPv6 addresses (which will be in a totally different format from existing IPv4 addresses), and implementing the new protocol in phases so as to not disrupt existing internet traffic. You may find this article an interesting read:
IPv6.com - IPv6 and the Next Generation Internet
I received a letter from my ISP a while back outlining what the consumer can expect over the next several months and years. Long story short, my ISP said to leave all of my existing settings as they were. They would notify consumers when and if changes needed to be made. Your ISP may become fully IPv6 operational before mine. Or vice versa. They would probably be the best source for current information for your particular setup.