DistroKid allows anyone to quickly upload a music track to iTunes, Spotify, Google Play and Amazon. First track is free, just $19.99 per year thereafter.
This seems like a steal of a deal. If Philip Kaplan can get the word out about this then I think it will be a huge success and (more than likely) acquired within two years. Which is why I'm writing it down to remember when I saw it.
For extra credit, read Kaplan's blog post about why he built DistroKid.