Below are a variety of techniques specifically for CSS3. They include information on mixing CSS3 with jQuery, using shadow effects and gradients, and even some collections that cover multiple techniques and tutorials.

Mixing CSS3 and jQuery
A thorough roundup of techniques for combining CSS3 and jQuery.

CSS Gradients in Action
A post covering examples of CSS gradients, with the code included.

The Shadow Effect In CSS3
An overview of using CSS3’s native shadow effect.

Go Beyond Web-Safe Fonts with CSS3
Design your typography around any of the variety of fonts available using a new CSS3 technique.

CSS3 Exciting Functions and Features: 30+ Useful Tutorials
A great collection of CSS3 tutorials to do just about anything.