I always hated the Macs until OS X and the newer hardware
(PowerBooks, G5's, etc....). Now I own two of them, and
use daily, in my PC network engineering job, my PowerBook
as my primary laptop in a large AD environment.
Not sure what you're asking though, but I can authenticate
to the domain/AD back end, access shared resources, etc.
using the built in Samba capabilities of the Unix
architecture. I can share out folders on my laptop too,
although don't have an AD/LDAP client that allows me to
assign rights based on users in the AD tree. It might be
possible somehow. But all I need to do is
email/Office/access shares, and for that it works fine.
Mike