CSS3 Selectors :last-child
Of all the CSS3 selectors (http://web NULL.archive NULL.org/web/20080503011837/http://www NULL.w3 NULL.org/TR/css3-selectors/) the structural pseudo-classes have to be my favourite. In particular I love :last-child selector, the :last-child CSS selector is incredibly powerful especially when positioning elements in a row, I am currently finding it incredibly useful when doing menus. Instead of providing a last class on the very last element in the row, you can now use pure CSS to achieve the same effect.
Read the full post on dtsn (http://dtsn NULL.co NULL.uk/2009/12/15/css3-selectors-last-child/)