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 invites implementation of the Candidate Recommendation of CSS Speech Module. The Speech module defines aural CSS properties that enable authors to declaratively control the rendering of documents via speech synthesis, and using optional audio cues. Note that this standard was developed in cooperation with the Voice Browser Activity.
W3C encourages everybody to implement this specification and return comments to the (archived) public mailing list firstname.lastname@example.org (see instructions). When sending e-mail, please put the text
[css3-speech] in the subject (alternatively you can email one of the editors and ask them to forward your comment).