[Samba] Winbind?

[Golden Butler]

Okay, 
I have a functioning Samba/LDAP PDC working.   I also have a  samba domain member server that uses the same ldap backend.  Saying all this, everything works, domain logins, etc.  But as I read the samba docs, they suggest that you use winbind also.  So far, I haven't used winbind in my configuration and was wondering if I'm missing out on something.  Is it necessary to use winbind, even thought I'm not part of a AD domain?  With my ldap and samba config as is, I can do a "getent passwd" and it lists all my users.  Here's a piece of my smb.conf:

[global]
   workgroup = DOMAIN
   server string = Main File Serv
   log file = /var/log/samba/log.%m
   logon path = \\%L\profiles\.msprofile
   logon home = \\%L\%U\.9xprofile
   logon drive = H:
   logon script = %U.bat
   security = user
   encrypt passwords = yes
   ldap admin dn = cn=admin,dc=domain,dc=org
   ldap suffix = dc=domain,dc=org
   add machine script = /sbin/yast /usr/share/YaST2/data/add_machine.ycp %m$
   domain logons = yes
   ldap idmap suffix = ou=Idmap
   ldap machine suffix = ou=Computers
   local master = yes
   passdb backend = "ldapsam:ldap://ds1.domain.org \
                     ldapsam:ldap://ds2.domain.org"
   wins server =
   wins support = no
   netbios name = domainpc
   domain master = yes
   preferred master = yes
   os level = 65
   ldap group suffix = ou=group
   ldap user suffix = ou=people
   idmap backend = ldap:ldap://ds1.domain.org

Is winbind necessary here?

- Delamatrix