They have released a library (can be used by premium users): http://www.spotify.com/blog/archives/2009/04/07/spotify-opens-its-doors-to-developers/ http://www.

They have released a library (can be used by premium users): http://www.spotify.com/blog/archives/2009/04/07/spotify-opens-its-doors-to-developers/ http://www.spotify.com/blog/archives/2009/04/07/spotify-open...