Shot in the dark, I know, but its going to be at least a month before I'll have time to build this correctly. I wouldn't ask if it were not for fear that the idea will loose momemtum without a place for interested folks to get together soon... Plus, I imagine a few folks might understand how useful this module could be. Thus, here's a shot in the dark, and basic spec of how the module is to work:

zengarden.module -- a module that enables an open-source approach to a drupal theme framework, and reusable CSS library. Yes, in many its kind of like the zen garden, but really more like listamatic... Here's how it would work: