There is absolutely no interest among U.S. internet service providers in implementing IPv6. There are efforts in places like Japan and China to push it out, but they are going to take a long time. I wouldn't bet you'll see any significant deployment of IPv6 in the United States before 2010.
cisco's been toolen around with ipv6 routers/switches since before last year so their ready to deploy. I'm sure they've even made nifty little black boxes that can go from ipv6 to ipv4 at some infinate cost ;)