Doof,
it looks like a great start. I think I would try to go towards something that gives more of a PixOs feel to it. Maybe you could try to do some of the things I did with the Brushed Metal inspired from JC's work, viz. make a border around the visualization window and put a special (bordered) background for the 'location' information and the clock. These borders and background could be made on the model of the mega/mini-me.
As for the general background, why not use something more simple like the same blue gradient of the mega/mini-Me skin? That might solve one issue that I see (and that I ran into with the Brushed Metal), namely that the white font of the track listing is difficult to read on a light background such as the one you've choosen. You could also play with the font color since it's now configurable.
As for the buttons the color is great, but I would have seen, again, something that feels more like the overall theme, that is buttons that look like the play control buttons of the mega/mini-Me (viz. same bevel, border, colors).
I hope this won't sound too critical, for I think you already have a great basis, something that looks far better than what I could have done myself...