Ned here again with a quick reminder:

Support for computers running Windows Server 2003 Service Pack 1 ends on April 14th, 2009. Yes, that's just under a month from now. After that point there will be no hotfixes, security updates, or support for computers that do not have SP2 installed. If you don't have SP2 on your deployment radar, you are rapidly running out of time.

http://support.microsoft.com/lifecycle/?p1=3198

Support for Windows Server 2003 with SP2 will continue until July 14th, 2015, so no rush there. Although you're missing out on all the Win2008 goodness.

- Ned 'Patch That Sucker!' Pyle