Anybody checked out the latest streaming music service? They aim to take the top spot, through the use of big music biz names, big brand names, big partnerships, etc. I think it's interesting that they have announced that they are not planning to offer a free tier, it's paid membership only. I checked out the app and it's pretty slick, though, I haven't actually tried the mobile apps from Spotify or Rdio etc. so I can't make a comparison.
EDIT: I hit a bug right away, couldn't sign up using Twitter, on Android 4.4. It crashed the Beats Music app every time I tried. Oops!