The Ticker: StumbleUpon; Startup PR; Silicon Valley’s boom; Social media mags; Gibbs on ‘Meet the Press’

ReadWriteWebStumbleUpon Delivers Half of U.S. Social Media Traffic

The Next WebPitch perfect: A startup’s guide to getting coverage

The New York TimesSilicon Valley Booms but Worries About a New Bust

Portfolio.comSocial-Media Mags Want to Friend Business Readers

MediaiteNBC’s Savannah Guthrie Grills Robert Gibbs On Obama’s Job Policy: ‘Why Doesn’t He Go For Broke?’