The social music sharing site has launched a Spotify app and is planning to share the API it used to create it with the hacking public. This Is My Jam (TIMJ), which allows members to handpick and share their favourite songs with an online community of music lovers, has developed the app to provide those Spotify users a little weary of trawling through millions of tracks with a direct route to great music (or, at least, music TIMJ members think is great).