Borrell Associates predicts that mobile ad spending in Palm Springs will quadruple by 2016, although it's a small percentage of overall ad spending, reports Piet Levy. Gannett's Desert Sun worked with a high school in Cathedral City, which has a large Latino population, on a news app focused on the school. “We had trouble meeting that community with the print product," said Greg Burton, executive editor of Desert Sun Media Group. "These kids are wired more than some of the people on my staff. They know the latest trends and help us see the future.” || Previously: Local ad spending on Web & mobile forecast to overtake newspapers by 2013