The Ticker: Paying for Twitter; Facebook + PR + MSM; Mad Men; Foursquare + loyalty

TheWrap: Annenberg Study: 0% Would Pay for Twitter

WebNewser: Facebook Wants to Work with Media Companies

AllFacebook: Facebook Reaches Out To Public Relations Industry

SFGate: “Mad Men” Spoiled Bastard. Ep. 1: “Public Relations.”

Mashable: Foursquare Checkins Now Part of Customer Loyalty App for iPhone