Real World GridView: Bulk Editing
http://blogs.msdn.com/b/mattdotson/archive/2005/11/09/real-world-gridview-bulk-editing.aspx
Real World GridView: Two Headed & Grouping GridViews
Finally ... Part 2 of Real World GridViews
http://blogs.msdn.com/b/mattdotson/archive/2006/03/01/541806.aspx