CSS Web Design

Rock Solid CSS Layouts at sitepoint
http://www.sitepoint.com/article/rock-solid-css-layouts/4
Article on CSS layouts from the web design experts at sitepoint.

CSS Basics
http://www.cssbasics.com/
Learn everything you ever wanted to know about the basics of CSS.

CSS tutorials from w3schools
http://www.w3schools.com/css/