As much as we're intrigued by the prospect of Twitter's music app, the rumored emphasis on SoundCloud would potentially limit the selection given major label resistance to giving away ad-free content: we'd expect a lot of DJ sets and indie demos. A supposed leak from AllThingsD has Twitter catering to the less adventurous among us by adding Vevo support. While the full workings of the rumored app remain a mystery, Twitter would reportedly play Vevo's mostly po