The Mysterious Pseudo Class in CSS
http://webtint.net/tutorials/the-mysterious-pseudo-class-in-css/
5 Advanced CSS Pseudo Classes that will Save your Day | DevSnippets
http://devsnippets.com/article/5-advanced-css-pseudo-class.html
5 Advanced CSS Pseudo Classes that will Save your Day
As it says on the tin.Meet the Pseudo Class Selectors | CSS-Tricks
:last-child, :first-child etc etc
Pseudo class selectors CSS selectors with a colon preceding them. You are probably very familiar with a few of them. Like hover: a:hover { /* Yep, hover isA complete guide to CSS pseudo-classes - Suburban Glory
not too much new stuff but a nice explanation