Do you want to know how the CSS WG works? Fantasai has written about:csswg, An Inside View of the CSS Working Group at W3C.
The Cascading Style Sheets (CSS) Working Group has published a new Last Call Working Draft of CSS Backgrounds and Borders Level 3. Substantial changes from the previous Candidate Recommendation include a new
content-box value for the
background-clip property, a change to the
background shorthand syntax for
background-origin, and the re-addition of the
box-shadow property. Comments on these changes are welcome through 6 July 2010, see the status section for details.