Nice feature!
Just curious, how long did the API extension approval take? (been waiting for almost 3 months on mine)
replies(1):
The Spotify Web API actually required no approval, because it does not integrate with the user's account.
The current version of my app uses AppleScript, and was approved by the App Store within 24 hours. The next version will use Scripting Bridge, but I don't anticipate that will be an issue.
In the most technical sense, my app is not really an extension to the Spotify app, it is a standalone app that communicates with the Spotify app using Apple Events.
Hope this helps :-)