Social media presentation by internet journalist Jeroen Mirck (Mirck Media, Emerce, Adformatie, Vara), who was one of the speakers of the Customer Media Congress on Wednesday 25 November 2009 in Philharmonie, Haarlem (NL). The story is all about LinkedIn, Facebook, Hyves, Twitter, YouTube, Flickr and (corporate) blogging. The conclusion of this presentation is a quote of Jeff Jarvis: "You have to give up control to gain control." More info: http://www.jeroenmirck.nl