Font Squirrel
"Create Your Own @font-face Kits."
When Can I Use
"Compatibility tables for features in HTML5, CSS3, SVG and other upcoming web technologies."
A List Apart: Articles: Supersize that Background, Please!
How to make an background image scale without using a ton of JavaScript.
Mislav on Uniqpath: Detecting device size
Using CSS to detect device size (for things like iPads and iPhones).
A List Apart: Articles: How to Size Text in CSS
Finally, a tutorial for getting size and line height to render and scale exactly the same in all browsers for a given font size. Requires some basic math in the stylesheet.