The best newbie integration is, as @Ganyemede says, getting people involved in helping new people, but in my case it's other players. On both Aether and Haunted Memories (Changeling), the number of people tripping over each other to help new people was astounding. Genuinely helping. No auto-greet scripts there. People can sense auto-greet scripts.
In the latter case, there was a chilling effect when staff locked players out of maintaining the sphere wiki, so I am going to mention that: Don't take an avenue that cuts players off from helping on every level.