Why we don’t have a parent selector – Snook.ca
Nice peak into browser performance rendering of CSS.
10 Things I Learned from the jQuery Source – Paul Irish
Code Snippet Gallery – Chris Coyler (of css-tricks.com)
Helpful collection of solutions to common CSS challenges & examples of modern CSS capabilities.
Does it still make sense to use em rather than px? – David B. Calhoun
Good read. Comments have some good points too. Moving from px to em isn’t just snobbery, the fact this measurement is relative to it’s parent font attributes, all decendant font styles will keep their relative sizes and line-heights when scaling the text. Although, as mentioned in the article, all modern browsers handle this themselves the main benefit can be seen when specifying a different base font style.