Whether any mobile music offerings gain traction depends a great deal on fickle consumer tastes — for Nokia's all-you-can-eat system, or Sony's and others' pay-as-you-go regime. "And then you have to assume that people want music on their phones ... I think the jury's still out on that." Last year, the entire music market — measured by album sales, or the number of tracks divided by 10 — shrank nearly 10 percent, and it is down about 5.4 percent so far this year. Full Article at San Francisco Chronicle