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Photo by: Ben Margot

In this photo made Aug. 3, 2010, two mobile phones are seen in San Francisco. If you want to hear whatever you want, whenever you want it, your best bet is a Web-based subscription music service. Two new ones are hoping to capture your attention and your dollars: Rdio, which was created by the founders of popular Internet phone service Skype, seen on the screen on the phone on the left, and MOG, which comes from the team behind a music blog of the same name. Both let you listen to an unlimited amount of high-quality tunes online and on your smart phone for $10 per month, and also let you connect to like-minded listeners, a tempting proposition, but still kind of pricey considering the appeal of some free alternatives. (AP Photo/Ben Margot)

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