Hello!

> My personal opinion is that, being IPv4 a scarse resource, the big
> systems/telco (who holds most of the content in most cases) should be
> pushed to implement IPv6 asap. And that would happen only with an
> aggressive (exponential) IPv4 fee plan that discourage the use of IPv4
> address space.

In Russia big telco tell us that they have troubles with using IPv6. Often 
often the manufacturer write that IPv6 supported, but it doesn't work.

And any aggressive fee plan will just increase costs and will not help with
developing network. I think that big providers will make changes only when
IP-adddresses in IPv4 will be finished. In this case telecom will request IPv6
support.