One of the most annoying SharePoint problems is that export breaks if the original site administrator user is renamed or removed from Active Directory.

Michael Van Cleave lists a fix -- although I haven't tested it, I was about 80% of the way to a solution using exactly his technique, so I'm pretty confident it will work.

He also has a very handy entry on migrating from SharePoint 2003 to 2007.

Nice job Michael!