May 28, 2009 6:02 pm The Oprah Effect Explained The Queen of Talk can turn a start up company into a multi-million dollar success just by saying she likes it. But how does she do it? US & World Videos 1:43 Kari's forecast: Warm day, Saturday rain 2:33 Downtown First Thursdays offers new hope to struggling SF merchants 2:41 College-bound students face deadline to apply for state aid 0:22 Violence at UC Berkeley protest encampment results in injuries 0:34 President Biden to visit Bay Area for fundraiser