Since we're NATed and were hosting our web site locally, we had public
DNS for our domain (delphian.org) and provate DNS more or less mirroring
the external using private IPs.

Now, we are getting the web site hosted (www.delphian.org) so we now
want www.delphian.org and delphian.org to resolve to the new address
assigned by the hosting service.

Question is, how to configure the private side to accomodate this
without having to switch to a completely new zone on the private side?

In other words, we have privately a delphian.org zone with hosts etc
defined and "delphian.org" in the "no forward" list. For numerous
reasons, we want to have everything privately to resolve as always to
the private side (host.delphian.org still resolves to the private IP)
and only "delphian.org" and "www.delphian.org" resolve to the new public
IPs (that are not any of our assigned public IPs).

Hope I have stated that correctly; since I am no DNS guru, I might be a
bit vague.

Tia,
Ken
--
Ken McLeod
The Delphian School
http://www.delphian.org