Hey everybody! I\'ve got a crazy idea. What about using colors in the playlist and in the tree as info sources?
e.g. there are Red, Yellow and Green. R = bad, Y = ok, G = cool; Or maybe R = rap, Y = rock, G = pop
There are 3 corresponding buttons on the panel. The user may press some color button while the song is playing, and the song is now highlighted with that color. The Album containing \'colored\' songs may be highlighted with a bar of 3 colors, proportionally. The same thing with Artist and Genre.
So, the look of each element of the tree can tell the user something about its contens, and it becomes easier to quickly organize a smooth playlist B)