Is this possible

[Jonathan de Boyne Pollard]

BF> You could have the W2k3 zones AD-integrated, so each W2k3 
BF> DNS Server would be a "master", but then you run into 
BF> serial number problems as documented in MS article 282826.

This is, of course, a red herring.  Since the serial number is irrelevant when
one is using Active Directory database replication, there are no problems with
it to run in to.