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 CSS Working Group has published a Last Call Working Draft of CSS Values and Units Level 3. This module covers new units like
em, but always relative to the root element’s font size) and
vh (percent of viewport height) as well as the
attr() functional notations.
Please review the draft and send us your comments! Best way to send feedback is to email@example.com mailing list with
[css3-values] and your topic in the subject line. (Alternatively you can email one of the editors and ask them to forward your comment.) The deadline for comments is 29 March 2012.