In our LN design team meeting, it was debated whether AD services will degrade the performance of Notes. The advantage of AD is obviously for server management while the side against touts ease of recovery should we have a disaster.
My Notes server is proposed to be 3.2 Ghz/1 GB ram/72 gb HDD running WIN2003 advanced server. I will be hosting @ 200 mailboxes and will be the hub server for my region, replicating to a worldwide hub server. I also wonder if the ram is enough for this setup.