I have recently completed to develop a course that overviews CSS3 capabilities. CSS3 is the latest standard for CSS. It extends the well known capabilities of the previous versions. Some of the more important new capabilities relate to transitions, transforms and animations.
You can find the community version of this course available for free personal usage at www.abelski.com.
Although CSS3 specification still wasn’t finalized, most web browsers already support it. The backward compatibility ensures that we don’t need to replace CSS2 code and we can keep the old web sites unchanged.