http://www.thetakeaway.org/2008/may/15/clay-shirky-on-cognitive-surplus-and-online-participatory-culture/ http://www.podtrac.com/pts/redirect.mp3/audio.wnyc.org/takeaway/takeaway051508c.mp3 Clay Shirky on cognitive surplus and online participatory culture http://www.thetakeaway.org/2008/may/15/clay-shirky-on-cognitive-surplus-and-online-participatory-culture/ true 6192 segment