http://www.dynamicdrive.com/

Most used CSS tricks -> http://stylizedweb.com/2008/03/12/most-used-css-tricks/

The 960 Grid System is an effort to streamline web development workflow by providing commonly used dimensions, based on a width of 960 pixels.
http://960.gs/

CSS Sprites: Image Slicing’s Kiss of Death  http://www.alistapart.com/articles/sprites

Can you take a simple list and use different Cascading Style Sheets to create radically different list options? The Listamatic shows the power of CSS when applied to one simple list.  http://css.maxdesign.com.au/listamatic/index.htm
http://css.maxdesign.com.au/

CSS Control Adapter Toolkit for ASP.NET 2.0
http://weblogs.asp.net/scottgu/archive/2006/05/02/CSS-Control-Adapter-Toolkit-for-ASP.NET-2.0-.aspx
http://www.asp.net/cssadapters/

ASP.NET 2.0 CSS Friendly Control Adapters: The White Paper
http://www.asp.net/CSSAdapters/WhitePaper.aspx