[JED3]

This is true, but Rdio still lacks the synchronized playback to the followers of a list, unlike what we're used to while listening to a real 'Rdio'. I believe this is what makes paulgb's idea proposal unique and all the more attractive to me that something out there would allow me to "listen to the music at the same time" while collaborating on what gets played next.

Examples: http://hackermusic.com, http://tunez.sourceforge.net/