HTTP://Support.microsoft.com/default.aspx?scid=/servicedesks/webcasts/wc031803/wcblurb031803.ASP contains:

Tuesday, March 18, 2003: 8:00 AM Pacific time (Greenwich mean time - 8 hours)

Level:200

The goal of this Support WebCast session is to provide a framework for administrators, consultants, and Support Professionals to follow when they upgrade Microsoft Windows NT 4.0 domain controllers to Windows Server 2003. The topics that will be covered include both pre-upgrade and post-upgrade checks, forest functional level goals, and a discussion of client interoperability issues that lead up to the introduction of Windows Server 2003 domain controllers.