Active directory

Solution
What's kinda common in the unix world is to make the pcs into xterms and have them log into one centralized server, that way you've got to configure one server and the pcs aren't really pcs any more.

This'll make configuring the network much easier but it's got some downsides.

http://en.wikipedia.org/wiki/Linux_Terminal_Server_Project

You'll save a ton of money on thin clients, energy and management costs if it's done right.

Good luck :)

linux_0

Splendid
What's kinda common in the unix world is to make the pcs into xterms and have them log into one centralized server, that way you've got to configure one server and the pcs aren't really pcs any more.

This'll make configuring the network much easier but it's got some downsides.

http://en.wikipedia.org/wiki/Linux_Terminal_Server_Project

You'll save a ton of money on thin clients, energy and management costs if it's done right.

Good luck :)
 
Solution
You have to pay if you use a closed standard controlled by a monopoly.. If MS had gone LDAP we could all be playing nicely together, but no, time for yet another standard that they have exclusive control over.

Hate the game not the player..
 
Yes, but authentication is only a fraction of what AD does. For example, the particular aspect that the OP was interested in was Group Policies. Samba doesn't let you do that. Samba is merely an open implementation of the SMB protocol. AD is a fairly complicated directory service which controls many other aspects of a Windows network.

Samba may be able to use AD, but it in no way provides AD services.