OWN is in the black for the first time since its rocky start two-and-a-half years ago. More than 30 new advertisers are joining original heavyweight sponsors Procter & Gamble and General Electric, and are paying higher rates as the channel has found its programming and distribution footing. Headlines about profitability and audience growth have replaced the drumbeat of speculation that her ambitious venture with Discovery Communications might end up a costly flop and an uncharacteristic failure for her.