Okay, close your eyes and relax your mind. Think about nothing – just a grey backdrop. Now allow an MP3 player of your choice to float in. iPod, Zune, whatever. Doesn’t matter. Now, from the other direction, float in Last.fm, or Pandora, or any other personalised radio service. Allow yourself to get a little cross-eyed as the two objects merge in your head and you visualize a portable device that streams a mix of songs to you based on your listening habits – your likes and dislikes.