[Zope-CMF] "statify" css

[robert]

I assume, that in a CMF/Plone setup css are not cachable since some of 
their values are created at runtime.

Is that assumption correct?

I created a tool cssGrabber that writes all css files that are used in a 
CMF/Plone site and writes them into a skin directoriy (in the FS) and 
adds a .metadata file with cacheing information.
EG for a standard plone site if creates files like the following:
 ploneColumns.css.dtml
 ploneColumns.css.dtml.metadata
...

agin, does that make sense??
Or ar the css files cached by some other means?

Robert