Last week a wrote a small article, taking a good look at Qt's new declarative UI format, QML as well as the new CSS3 features in WebKit, allowing for somewhat similar features.
Both are very interesting technologies, that might become quite important in the long run, so if you are interested in one of the above, you should really go check out the article :-)
The article introduces the two technologies, their concepts, and tries to look at their similarities and differences. Write writing the article I implemented some examples in both QML and CSS3, and I have based some of the article on these findings.
You can find the article here: