Cool Blue is a desktop widget for SuperKaramba for system monitoring.
It has cool blue translucent background (which I made with help of Karbon14, Krita and the mighty Gimp) and displays everything I need (and probably what you need too).
It can interact with XMMS. Well, it's a matter of personal taste, but I still like XMMS more than AmaroK...
Anyway, if you want, it should be easy changing it to use amaroK. Maybe even I'll do this if I have free time and appropriate mood. | 
