2008: Year of the Layout Engine – CSS3.info takes a look at the four major categories of web browsers, and where they’re likely to go this year.
Also, Progressive Enhancement with CSS3. This is an approach I’ve been taking for quite a while, particularly with my personal sites, but it’s starting to creep into sites I’m building for work as well. Essentially: Build it to look decent in everything, but throw in enhancements to browsers that you know can handle them.
An example of progressive enhancement: the rounded corners on the tabs on my Flash site. They’re not critical to the design, but it does make it look better in Safari and Firefox. And in theory, Opera and IE will eventually pick up the capability. (Though in this case, since border-radius is still experimental, I’ll have to change the CSS when they do—so maybe it’s not the best example.)