I just found this pretty good video on the apple site describing – at a high level – Mac integration with Active Directory.
http://seminars.apple.com/seminarsonline/activedir/apple/
For someone from a Windows background (like me) it’s worth a look. It’s also interesting to see the difference in style between the Apple and MS. Given the brand personas of the two companies you’d expect the styles to be reversed, with the more friendly informal stuff coming from Cupertino rather than Redmond. But, you can’t fault the content.