Santa Barbara-based RingRevenue, a developer of pay-per-call technology headed by Jason Spievak, is powering a new performance marketing firm called OfferMobi. OfferMobi said today that it has launched a new, mobile advertising firm targeted at cell phone and smart phone users. The company said that it will operate a U.S. affiliate network focused exclusively on the mobile web, based on RingRevenue's call tracking technology. OfferMobi did not detail business arrangement with RingRevenue.