Hard to see how this is useful. Songs don't get removed from playlist once played. So it's exactly the same as dragging to a simple playlist. What would be great is if you could use queueIT when playing a song, it would go to the queued song after the song currently playing was done (not just cut it off straight away) and then once the queueIT list was complete it would go back to the library/playlist you were playing in the first place with no interuptions. E.g. So you could faciliate "requests".