We just released the Microsoft® Office SharePoint® Server 2007 Training Portal Edition.  This is server based mechanism for providing MOSS training to your end users.  It includes the ability to track which users have completed the training.

Microsoft® Office SharePoint® Server 2007 Training Portal Edition

http://www.microsoft.com/downloads/details.aspx?FamilyId=673DC932-626A-4E59-9DCA-16D685600A51&displaylang=en