I just recently played around with some of the new properties available with CSS3. My portfolio site has rounded corners and shadow applied to the jQuery overlay. CSS3 is the latest standard for CSS. Although most of us have had mostly theoretical courses up to this point, we have heard over and over to keep the interface seperate from the functionality. Well that's what CSS does for web development, allows you to keep the design seperate from the actual contents.
To get you started with CSS3 check out: