Flexible Box Layout Model is now a working draft at the W3C. The new layout model is going to change the way we think about layout.
Give Floats the Flick in CSS Layouts at Sitepoint is another kick in the pants and the way we’ve thought about layout in the past few years.
Hardboiled CSS 3 Media Queries at Stuff and Nonsense is a downloadable CSS file that make it easy for you to start using media queries right now.