Doing AD without installing a DC (and more goodies)
As developers of .NET apps we all know that ASP.NET and Domain Controllers don't mix well (though you can get them to somewhat work). However, we still have a need to develop against AD (Active Directory). The following link will allow you to download many goodies for Win2003 including ADAM:
Active Directory® Application Mode (ADAM) is now available for download. Organizations, independent software vendors, and developers who want to integrate their applications with a directory service now have an additional capability within Active Directory that provides numerous benefits.
http://www.microsoft.com/windowsserver2003/downloads/featurepacks/default.mspx