Both Media Queries and the 'view-mode' Media Feature became officially a W3C Recommendation today. Yay !

Media Queries: http://www.w3.org/TR/2012/REC-css3-mediaqueries-20120619/

The 'view-mode' Meda Feature: http://www.w3.org/TR/2012/REC-view-mode-20120619/