Here is another set of videos and training material for Office SharePoint Server 2007. http://blogs.msdn.com/b/dhirajm/archive/2010/05/31/demos-and-training-for-office-sharepoint-server-2007.aspx

  The presentations provide details about key enterprise search capabilities in Microsoft Office SharePoint Server 2007. http://blogs.msdn.com/b/dhirajm/archive/2010/05/31/training-videos-for-sharepoint-enterprise-search.aspx