Pinterest is now the number three most-popular social network in the U.S., behind Facebook and Twitter, according to Experian Hitwise. A new report from the researcher shows Pinterest got 21.5 million visits during the week ending Jan. 28, a nearly 30-fold increase over a comparable week in July. ... Read more...

Two years ago, a Stanford business school student named Tristan Walker sent Foursquare cofounders Dennis Crowley and Naveen Selvaduraian email out of the blue, asking for a job. Today, Tristan is Foursquare's director of business development. During his tenure, he's built partnerships between F... Read more...
Pandora has been served a subpoena related to a federal investigation into personal information shared by smartphone apps "that run on the Apple and Android mobile platforms," according to an update to the SEC filing that announced the company's plans for an IPO. Pandora said the government has i... Read more...
The marketing industry was rocked in 2010 by an influx of significant events that changed the way we do business. The following list is my picks for the 6 Events that Shifted the Online Marketing Landscape in 2010. 1) Net Neutrality and the FCC’s rulings Net Neutrality isn’t sexy enough to... Read more...

Facebook Inc. introduced a service that makes it easier for users to share their whereabouts with other people, making a deeper push into a fast-growing market pioneered by Foursquare Labs Inc. The feature, called Places, is aimed at helping users of the social network find friends and disclose... Read more...
Beginning next month, Facebook may start telling its users not only what their friends are doing, but also where they're doing it. The New York Times' Bits Blog says the popular online social network will announce this "location-based" feature at its upcoming conference, called f8. The conferen... Read more...
Reassuring people about privacy makes them more, not less, concerned. It's called "privacy salience," and Leslie John, Alessandro Acquisti, and George Loewenstein -- all at Carnegie Mellon University -- demonstrated this in a series of clever experiments. In one, subjects completed an online sur... Read more...
London, England (CNN) -- As 2009 draws to a close, with Twitter undoubtedly this year's media darling and Facebook continuing on its path to global domination, you may wonder which social-media service will become tech's poster boy in 2010. Among the Web's early adopter set, the answer is nearly ... Read more...