Responsive and Fluid Web Design

Responsive Web Design: What It Is and How To Use It

This is a great article about how it works and different ways to implement responsive design using css

A List Apart: Articles: Responsive Web Design

Tips for media queries

Different Stylesheets for Differently Sized

Browser Windows

JavaScript ie media queries

Rethinking the Mobile Web by Yiibu

Testing media style sheets

Fluid Images

This article is about fluid or resizing images that resize with the website.

How to Size Text in CSS

About using em