Thanks all
Good idea for the sliders - I didn't make a line for the volume one as I did for the balance because it would pass right over Zilly's eyes. The bevel indentations is a good idea.
I deliberately haven't "raised" the buttons, as I thought that might take away from the image - I didn't want to clutter things too much (though they do press down - ie. I did bevel the buttons for their "pressed" state, to give the feel of a proper button). Also, I like the nice, matte, pulp magazine feel of the album cover, I tried to keep that.
I can give a go and see how it looks - I am using Photoshop, so it's not a huge undertaking. Maybe I can make two versions (though the site I upload them to might not want two versions of one skin).
Right now I'm just working on the Media Library, Video, Minibrowser skins... and trying to make them look half-decent at least when they're stretched.