[wp-hackers] Share CSS with parent site

[Dan Gayle]

I'm running an installation where the blog is integrated into an  
existing website. The blog sits outside the root directory in /blog/

We matched the styles of the parent site with the styles in our theme,  
but we would like to take it a step further. It sucks having to  
maintain two identical sets of stylesheets.

How is it possible to share one single css file between both the  
parent site and the wordpress install?