Skip Track button & Que Next button
Really a Skip Track Button and Que Next button.
Here is why I think that is good idea.
Skip Track Button - this would give you the ability in the main player screen, to click on the track that is playing which would cause it to immediate fade into the next song on the list.
Que Next Button - with this feature you could select any track on the main player screen, hit the Que Next button, and after the current song gets done playing, the song that you 'que next' will play immediately after.
P.S it would be nice be able to scroll with the up and down arrows on the keyboard to select tracks on the Main Player screen (the big one with everything currently schedualed to play)