This is a page from the Cascading Style Sheets Working Group Blog. Some other places to find information are the “current work” page, the www-style mailing list, and the Future of CSS syndicator.
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.
transform-origin into x/y/z sub-properties
@supports is going to L ast Call next week unless people find blocking issues, so don’t forget to review (esp. OM changes)!!