After playing for a while with Fedora Directory Server I found out it to be a bit heavy for my testing machine so I decided to push it aside until I have a good testing platform.
While playing with FDS I got myself very interested in LDAP so for the change I decided to see what I can do with OpenLDAP.
One day of reading and I set up a testing NT Domain controller on Samba and OpenLDAP as a Directory Server. IDEALX have some works on integrating Samba with OpenLDAP and they provide a set of tools smbldap-tools plus step by step documentation on how to set up and administrate Samba NT Domain.
Now I am looking forward to add some mail server to the directory system and if it will go ok I am thinking about FTP and other possible things to have a complete system powered by the directory :)