Credit: WireImage, Kevin Mazur – Mark Zuckerberg, Spotify CEO Daniel Ek, Snoop Dogg and Sean Parker On stage during Facebook’s massive f8 developer conference this past September in San Francisco, Mark Zuckerberg introduced the world to frictionless sharing and the future of music. Freshly minted alliances with Spotify, Turntable.fm, Clear Channel, Rdio and many other services now feed the new “Music” dashboard that transforms friends into social DJ’s and music store clerks. In between their status updates, Facebook’s new frictionless…