Hi coppermine, im looking to do the same thing. At the moment, just get Samba running as a PDC and authenticating against an OpenLDAP server (pam is for local authentication, right?).
As you have said, ive found many tutorials for various linux flavours and mailing list postings. But nothing really related to FreeBSD specifically. I think such a setup guide would be very helpful for FreeBSD users.
The closest i have come to a full tutorial is this
http://www.opensourcehowto.org/how-t...ba-as-pdc.html
I have a openLDAP 2.3 server running that seems to be setup correctly (i can query it etc.) but im having problems getting Samba to authenticate against it. Im just stabbing around in the dark really, using mainly that guide above.
Ill play around a bit more and see what i come up with over the next couple of days.