Muscles of social media

Everybody witnessed Fecebook's and Youtube's role in Obama campaign in presidential election. It was the first time social media was used so effectively in political campaign. I was reading HBR post on how social media is penetrating and how deep it penetrating. This is another example of social media punch http://blogs.hbr.org/cs/2010/06/twitters_new_role_in_south_kor.html