RE: How long much advanced notice do ISPs need to deploy IPv6?

> So, since there won't be a flag day, ...

Maybe that's the point. The notion of Internet flag days has
largely disappeared as the Internet's ubiquity and
criticality have increased. There won't be flag days for
IPv6, S(o)BGP, BGP-5, etc.

So what's a company like Verisign to do when they want to
substantially change the way the COM and NET zones work?

Apples to Oranges.

There is no single point declaring the protocol to be used to connect to the
Internet. Without that sort of control, no substantial change can be
forced.

Thanks,
Christian

PS: Randy B., please stop your braindead, indiscriminate
I-don't-want-legalease automagic spams that react to mailing list(!) mail.