Re: Layered presentation on a single element

> the more simple examples I could think of. A better example would 
> probably be multiple borders:

Once you get to this complexity, you really want to get into a
vector format.  Unfortunately pure SVG lacks the structure and
reflowability of HTML, and transforming (XSLT) from HTML will
also lose the reflowability.  I think you should be concentrating 
on making SVG a good XSLT output format for HTML, rather than 
creating tools for CSS hackery.

If done in CSS, I'd suggest what you really need is the ability
to created a parameterized background image in a vector format, moving
the graphic complexity into a more appropriate language.