I've given up on round corners and alpha channels for now. You can download the first release here. And look
here for a screenshot. The archive also contains a mui preference file.

@hooligan
You beat me to it I allready planned different colors for my theme, it's very easy in Photoshop with Image Variations. That's how I made the active windows.

@klesterjr
Do you mind if I use the buttons from your ImAz skin? They really look good.

-toto