However, nonr of the Macs are getting registered in DNS (for example - I can't resolve any of the the Macs with forward or reverse lookup tools)
WIndows and Mac clients are getting DHCP addresses with no problems, but only the Windows PCs are registering in DNS properly (Microsofts Dynamic DNS is at work here obviously). DHCP is being provided by Mac OS X server (Tiger Server) and DNS is being provided by my AD Domian Controllers (Microsoft DNS is required for AD to work correctly as I understand it). I have an Active Directory 2003 domain with both Mac OS X Macs and Windows XP PCs.
I have a test lab in place for experimenting with Mac OS X and AD, DNS and DHCP.