The September 28th issue of Time magazine had an interesting article entitled, ‘Where Wikipedia Ends’ that although Wikipedia hit the ‘3 million article mark’ in August 2009 its ‘growth line flattened’ in early 2007.  The article looks at some of the possible reasons such as ‘has all knowledge been summarized’, has the site become too difficult to maneuver, has the editorial layers become too thick, etc.  I would add that it could be that the ‘volunteers’ who have edited it may have a limit on their time as I do.  There are SO many things I want to write about, create and do on the Internet but there is only so much time.  ‘Social Network Sites‘ outlines the history of sites that take up our time in this Web 2.0 world.  Examples: