"this code is still being actively worked on and maintained."
The "still" is not necessary in this sentence :-)
I installed OpenSUSE 11.1 with KDE 4.1 on my notebook and everything just
worked out of the box, including all the 3D effects, completely
integrated with the DE. The effect are not only the desktop cube, but
also translucent windows, e.g. a translucent panel, which does make
sense, grayed out windows if a modal dialog is open (very useful),
overview over all desktops and more.