Button Basics

http://jacojoubert.ca/post/7210637533/button-basics ...

Apple OS X Lion Buttons in CSS

http://pixify.com/blog/use-os-x-lion-to-improve-your-ui/#demo ...

CSS3 buttons by Chad Mazzola

http://hellohappy.org/css3-buttons/ ...

CSS3 Facebook Buttons

http://nicolasgallagher.com/lab/css3-facebook-buttons/?#button ...