The world of mobile streaming music just got a little more interesting as social music blog MOG and startup Rdio prepare to enter the market with apps for Android, Blackberry and iPhone users. Pitching themselves as cloud-based alternatives to the iTunes store, both companies hope to make a dent in a market which includes players like Rhapsody and Apple. Unlike Apple’s iTunes however, both MOG and Rdio offer users the ability to stream music directly to their mobile device.