CSS3 - Cascading Style Sheets Level 3
CSS 3 Style Properties
CSS 3 has not been approved as a specification, but there are already a lot of properties that are supported in various browsers. These are the style properties that may be included in CSS 3.
Your CSS3 Media Query Recipes
CSS3 media queries allow you to define very precisely the types of devices that should use various style sheets. Find out what CSS3 media query recipes other designers use and why they like them. And then share your own favorites.
Introduction to CSS3
CSS 3 is still a working draft specification, and the best place to get information about it is from the CSS 3 working group's drafts. This introduction to CSS 3 explains what the plans are for this version as well as what will be included.
CSS 3 Selectors That Work Right Now
CSS 3 is not yet complete, but there are some selectors already available that you can use to help improve your documents destined for a Mozilla/Firefox audience. CSS 3 selectors give you a lot more flexibility and power with your Web documents.
CSS3 Preview - CSS3.info
See some of the new effects in CSS3 as they are implemented into browsers.
CSS 3 Selectors
While CSS 3 is still in production, you can review the selectors that are already in use in CSS 2 and CSS 1, as well as the proposed selectors for CSS 3.
CSS3 Modules - CSS3 . info
CSS3.info is maintaining a list of the CSS3 modules and their status in the recommendation process. There is also a browser compatibility column, although almost none of the modules have anything there.
size
A description of the CSS property size