one can tell immediately that cascading style sheets didn't make web design a better but even worse place, instead, by only taking a cursory look at how people desperately tweak around just to make current browsers display the same font size.

however, some wicked and fresh css resources: the selectoracle translates stylesheets into plain english or spain language; peter paul koch's css 2 tests (also available for javascript); different meaning of font sizes with excellent, though not up-to-date browser screenshots for comparison.