It's 2013, and human beings are still trying to figure out how to automate music discovery. Trends come and go, new services pop up and disappear, and a music discovery app is created, marketed, and killed off every few days. The thing is, no algorithm, social networking service, or customizable radio station has been able to really nail it. There's still nothing quite as effective as a friend saying, "You like so-and-so? Check this out."