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 W3C published a Last Call Working Draft of the CSS Snapshot 2007. If you are following the development of CSS and you haven’t read it yet, I recommend doing so. Its goal is to put the various specs in context and create a coherent picture of the current state of CSS. The deadline for comments is June 9th.
The W3C has also published a Candidate Recommendation of the CSS Namespaces module. This module has been implemented for years based on a 1999 draft spec, so the module is just starting to catch up with the times. The two major changes that implementors should be aware of are: prefixes are explicitly case-sensitive, in line with our resolution of CSS2.1’s case-sensitivity issue; and handling of empty-string namespaces has been clarified.