Shadow support improved from last post. The supersimple layout lets you turn shadows on and off, and also select the shadow color. All the other layouts will get the options soon enough ... the code's all generic.
Some non-black shadows against a non-white background:
I made a new theme for super simple called "Forest":
If anybody wants to start making themes, please do! Just play with all the customization settings for some layout until you get something that looks nice, give it a good name, then post it.
For now, only develop themes for supersimple. The other themes aren't reflecting enough options to do anything too interesting with them.
Also, a reminder: you were given disk space because you were supposed to be testing things and reporting problems/shortcomings. *nudge nudge* :-)