My randomly-selected music recommendation system is now fully automated! That is, it's now a Twitter bot named Music Suggestron. That's how services get automated these days, right?
Music Suggestron uses Spotify for almost every link at the moment but I'll try to get it to spit out links to other sites soon. There's a decent-looking Python wrapper for the Soundcloud API. For now, though, it's a continuing list of tracks and artists you may have never considered listening to.