The Ticker: Olympic PR; Happy birthday Facebook; Stewart enters No-Spin Zone; Foursquare’s model

TVNewser: Jon Stewart: ‘Fox News is the Most Passionate and Sells the Clearest Narrative of Any News Organization’

Silicon Alley Insider: Foursquare Plots Its Business Model

Mashable: Facebook turns six years old

PRWeek UK: Edelman, H&K and Freud in battle to promote 2012 Olympic Games

Experian Hitwise: Facebook Largest News Reader?