Entity Framework - POCO self tracking entities

My links:

http://blogs.msdn.com/b/efdesign/archive/2009/03/24/self-tracking-entities-in-the-entity-framework.aspx
http://msdn.microsoft.com/en-us/library/bb896269.aspx
http://msdn.microsoft.com/en-us/library/dd456854.aspx
http://msdn.microsoft.com/en-us/library/dd456848%28VS.100%29.aspx
http://blogs.msdn.com/b/adonet/archive/2009/06/10/poco-in-the-entity-framework-part-3-change-tracking-with-poco.aspx