The Guardian has recently released an alternative way of revealing the social impact of important news stories. More specifically, they have tracked all the tweets regarding the News of World scandal, and visualized the relative frequency of common keywords by way of animated bubble graph.
At least two versions exist: one that aggregates the tweets regarding the parlementary interrogation of Murdoch [guardian.co.uk] (be sure not to miss how Twitter explodes when he got physically attacked around 16:48!), and one that follows the #notw hashtag over a period of 4 days.
I believe this visualization would have even be better if the middle image of Murdoch would update according to the shown timeline, and access to some actual tweets would be given.