Love that Pandora app? Well, we've got good news and bad news for you. The good news is that AT&T's wireless head honcho Ralph de la Vega says it's hard at work at improving service in San Francisco and Manhattan, where it sees especially high smartphone penetration -- and coincidentally a higher concentration of whiny tech journalists. The bad news, though, is that it might end up hitting you in the pocketbook. Speaking to investors today, de la Vega mentioned that the company is well aware that downtown New Yorkers are suffering, specifically calling out the area for "performing at levels below [its] standards" expressing confidence that it's going to get the problem resolved. In the same breath,