> I don't know Mr. Cheriton, yet I do think he makes some interesting points.

You might like to have a look at the following document if you haven't
seen it already (and some of the other documents about how NAT is not
desirable in all situations).

ftp://ftp.ietf.org/internet-drafts/draft-iab-case-for-ipv6-06.txt

This is pretty regularly hashed out on the ipngwg (and IETF) mailing
lists...

Cheers,
Rob