The Problems with Themes, Skins, and Cascading Style Sheets (CSS) - Where it all Falls Apart

http://adam.kahtava.com/journal/2006/11/08/the-problems-with-themes-skins-and-cascading-style-sheets-css-where-it-all-falls-apart/

10 rules for effective use of CSS in ASP.NET

http://nimad.wordpress.com/2007/10/02/10-rules-for-effective-use-of-css-in-aspnet/