A couple of people said they were either working on CSS or had issues with it. I thought it might be a better idea to have a sub for this rather than write up a guide, so other people can contribute and ask direct questions. We can grab helpful stuff from posts and put them in guide stickies or something, or perhaps use all the best stuff to put it into a guide page somewhere on the site, maybe on the edit stylesheet sub pages.
So yeah, if anyone has questions about the CSS, or wants to contribute anything helpful, this is the place.
There is currently an open task to implement this.
When it is possible we'll have a post here to show people how to do it.