With the highly successful launch seen by Pandora’s iPhone app, streaming digital radio seems ready to finally go mainstream. Unfortunately, as great as Pandora is, its music recommendations can shy towards music you already know – you may like the song that gets recommended, but there’s a good chance you’ve heard it before. For listeners looking for something that’s entirely new, there’s StumbleAudio, a streaming music service exclusively for indie music that is launching today with a catalog of over 120,000 artists and 2 million songs. [MORE]