I think you should upgrade to server 2008 now. It is the most secured server operating system built from the bottom up by microsoft with the Trusted Computer initiative. The incredible Read-only domain controller, Server Core! How about the Virtualisation called Hypervisor. And many more! Check back this blog for more info.
For consulting and training help on all Microsoft windows consulting and training contact me at firstname.lastname@example.org or email@example.com, firstname.lastname@example.org.
Remember to discover the innovation and creativity in you.