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text-shadow и эффекты на его основе.

http://www.1stwebdesigner.com/css/blurry-menu-css-tutorial/

http://www.1stwebdesigner.com/css/advanced-css-text-effects-web-typography-tips/

http://fredericiana.com/2009/06/10/stylish-text-with-the-css-text-shadow-property/

http://www.zachstronaut.com/lab/text-shadow-box/text-shadow-box.html

http://maettig.com/code/css/text-shadow.html

http://vremenno.net/html-css/text-shadow/

http://www.kremalicious.com/2008/04/make-cool-and-clever-text-effects-with-css-text-shadow/