Re: @boxplayer - "Nobody uses it..."
One of the universities I worked for transitioned to IPv6. There were some hiccups at first but once the routing was sorted out, I set up some dual-stack servers without trouble. (I believe the Internet2 academic research network runs IPv6.) In some ways universities have fewer incentives than most, because many of them got huge allocations.
The biggest problem isn't that it's difficult, it's that there's still a lot of old equipment rattling around that either doesn't support it at all, or doesn't perform well enough. I've seen places gradually phase it in as they replaced crusty old routers with new kit.