> The mainstream commercial ISPs are going to make this
> far more painful than it had to be.
It's not the ISPs. It's the vendors of so-called "routers". Those ADSL- and cable-modems. They just can't do IPv6. Most backbones are IPv6, and have been for years. And if your modem/router at home could do IPv6, you would have had IPv6 for some time now. Conversely, the content providers (which can implement IPv6 easily) don't see any use for IPv6, because the users don't have IPv6.