CSS is very powerful.There’s a lot of really cool things that can be done using CSS and I’ve found some of the following resources to be very helpful to inspire ideas and learn new techniques.

10 CSS Tutorials from cafetutorials.com

Hoverbox Image Gallery - This is a very nice roll-over photo gallery that uses nothing but CSS , no JavaScript.

Rounded Corners There are tons of ways to make rounded corners with CSS.

CSS Drop Shadows - very nice link

Floatutorial Floatutorial takes you through the basics of floating elements such as images, drop caps, next and back buttons, image galleries, inline lists and multi-column layouts.

CSS Vertical Menus from exploding-boy.com