Here some some more:
http://usa.autodesk.com/adsk/servlet/item?siteID=123112&id=7024848
http://www.dgcad.com/Acad2006-DynamicBlocks.htm
http://www.ellenfinkelstein.com/AutoCAD_tips_chain_dynamic_blocks_2006.html
http://mdouglas.blogs.com/in_the_dynamic_interface/2005/09/duplicate_attri.html
http://mdouglas.blogs.com/in_the_dynamic_interface/2005/08/dynamic_block_p.html
http://mdouglas.blogs.com/in_the_dynamic_interface/2005/06/dynamic_block_t.html
http://www.cadopolis.com/autocad_addons/eBook_Tailoring-Dynamic-Blocks-AutoCAD-2006.shtml