This is great. One little thing, after the last song in the playlist is over, it would be nice if the state remained in play mode so that when another song is added to the queue the new song would play right away.
Also, I've been wanting something just like this but that would also play the video as well as audio.
Will ship that feature request. I can understand why that would be useful.
I thought about doing video, but that requires downloading and storing much more content in S3 which makes the app feel slower than it already does for just the audio.