Thus spake "Daniel Golding" <dgolding@yahoo.com>
Hmm. I'm afraid that I have to disagree with just about everything you've said :) . I haven't seen any enterprise folks demanding v6 - If VOIP and PDA's (?) use up their IP addresses, they can easily ask for more. The more you use, the more you get. There is no shortage of v4 space.
Most enterprise folks use nowhere near their paltry allotment of IPv4 addresses because 95% or more of their hosts are on RFC1918 space. Even most companies with multiple class B legacy allocations use RFC1918 internally and are just holding the class B's so they can multihome effectively.
Basically, major backbone networks will deploy v6 when it makes economic sense for them to do so. Right now, there is no demand and no revenue upside. I don't expect this to change in the near future.
Enterprise networks will not be the driver for ISPs to go to IPv6; NAT is too entrenched. Perhaps greater adoption of always-on broadband access will be the necessary push. S