Common Sharable Content: A Missing Feature of Web 2.0

Web 2.0 is taking a very important place among the current trend of web, where rather considering "human to machine communication", "machine to machine communication" and "human to human communication" is regarding more. It has various new approaches which are making the web space better. From my point of view, "Common Sharable Content" concept is EXACTLY what is missing here. Of course this concept encourages the "machine to machine" communication and thus make personal info management over web better.