Taming Advanced CSS Selectors

How about a Hacker [News] version of this...

http://www.w3.org/TR/2001/CR-css3-selectors-20011113/#select...

I don't generally engage in meta arguments, but HN is not the place for gentle Smashing Magazine intros to something as basic as CSS selectors. The only thing worth reading from the article might be the specificity portion, but it's usually more than enough to say:

id > class > else

This article has been added to my 'must read' list. I find myself getting thrown into the CSS pit and need a solid intro to it. Thanks for posting it!