This is my second Karamba theme. 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 :)
From Russia with love! ;-)
Brought to you by russian "wannabe opensource hacker" university student.