eMusic CEO David Pakman estimates that Amazon.com's MP3 store may have sold 27 million tracks since opening 6 months ago — which sounds good until you consider that Apple's iTunes moves 2 billion songs a year. Pakman also estimates that Amazon's store is adding $7 million, after the labels' take and expenses. At least people are looking forward to a new Kindle, right? [Silicon Alley Insider]

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