Fear of Style Sheets  
   on the benefits of style sheets. By Jeffrey Zeldman.
   http://www.alistapart.com/stories/fear/

Why use CSS?  
   Article that covers the benefits of CSS.
   http://tech.irt.org/articles/js135/

Guide to Cascading Style Sheets  
   A series of articles and tutorials. Includes introductory topics, properties list, syntax checker and references.
   http://www.htmlhelp.com/reference/css/

Web Design References: Cascading Style Sheets  
   A comprehensive list of links to articles and tutorials.
   http://www.d.umn.edu/itss/support/Training/Online/webdesign/css.html

Cutting Edge CSS  
   A site that explores the cutting edge possibilities of CSS. Both fun and serious examples and demonstrations in all aspects of css from simple navigation to complex layouts.
   http://www.s7u.co.uk

CodeAve.com: CSS  
   Offers style sheet code samples, illustrating many popular interactive website development techniques. Includes several script generation tools, to help authors build customized features without programming
   http://www.codeave.com/css

SELFHTML: CSS Style Sheets  
   Describes the language of Cascading Style Sheets (CSS), which supplements HTML and allows you to format HTML elements with great precision.
   http://en.selfhtml.org/css/

Digital Web Magazine - CSS  
   Collection of articles and tutorials.
   http://www.digital-web.com/topics/css/

CSSing  
   A variety of tutorials with some examples and techniques for using cascading style sheets.
   http://cssing.blogspot.com/

Stylesheets Guide  
   Explains what CSS are and shows examples of how they can be used.
   http://webmonkey.wired.com/webmonkey/reference/stylesheet_guide/

Nemesis Project  
   A CSS resource featuring news, links, articles, scripts and tips.
   http://nemesis1.f2o.org

CSS Maxdesign  
   Explains how to create different list layouts with Cascanding Style Sheets.
   http://css.maxdesign.com.au/

CssDev  
   Blog, resources and tutorials by Andy Peatling.
   http://www.cssdev.com/