New resource (worldwide):
http://www.vetworld.com/vetusa/index.html
 
It helped me tonight find those who say that they are ferret vets in
two places which weren't in other listings.  (The qualifications of one
of them sounded incredible, BTW.)
 
Here are other ways to find vets:
 
http://www.ferretcongress.org (crit refs but there is a lot more there)
http://www.supportourshelters.org
http://www.smartgroups.com/vault/ferrethealth/ReferenceShelf/FerretVets.htm
http://fhl.sonic-weasel.org/vets/ Search by zip code, read FAQ first.
http://www.quincyweb.net/quincy/vet.html
http://www.miamiferret.org/fhc/vets.htm
http://www.ferretcentral.org/for-others/db-vets.html
http://www.ferretuniverse.com/index.html
http://www.geocities.com/houseferrets13uk/Vets.html UK vets
http://www.ferrets.org/Veterinarian_Listings.htm British Columbia vets
http://www.ferretnews.org/clinic.html California-specific
http://www.ferretsanonymous.com/medical.html California
 
(also check with your area ferret clubs and in magazines)
[Posted in FML issue 4800]