Spotify may not be launching into the USA until 2010, but the innovative streaming music service may already face stiff competition from all-new and soon to launch service, Rdio.

This new streaming subscription service was founded by Skype/Kazaa pioneers, Janus Friis and Niklas Zennstrom. What the service will do on launch remains shadowy, but the company has now released an iPhone app, making this available to all via the App Store.

Snag is, to use it you have to be a member of the private beta tester

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