Just written a new post on CSS3.info (the first for a long time), on the subject of the progression of a couple of layout modules through the W3C recommendation process. It’s actually a bit more exciting than I’ve just made it sound.
WAI-ARIA is a relatively new standard from the W3C, which provides semantic information to assisted screen reading technology. It’s fairly rapidly being adopted by browser makers and should become a part of your mark-up toolkit.
As well as being good for accessibility, it’s also useful to provide hooks for CSS and Javascript. Here are a just a couple of quick ways to get started using it.