Facebook is rumored to start holding hands with Spotify on a music-streaming service that could be launched within a fortnight. It is currently going through testing and when launched, Facebook users will see a Spotify icon appear on the left of their newsfeed, along with the usual icons for photos, events and CityVille.

Once that icon appears, clicking on it will install the service on their desktop in the background and will allow users to play from Spotify's library of millions of songs through Facebook. The service goes one step further since it's on a social networking site, by letting Facebook users listen to music simultaneously with their friends over Facebook.

The new service might be called "Facebook Music" or "Spotify on Facebook", but unfortunately, it will only be available to Facebook users who are in countries where Spotify has a presence - surprisingly, this excludes the United States.

Since this will crush your souls to read this news about it not being released in the states, I'll leave the rest of this in the source for you to read.