CSS

Cascading Style Sheets: Celebrating 10 Years with Style - W3C mini-site to mark the 10-year anniversary of the first published CSS recommendation. Includes time-line, hall of fame, essays, and a gallery.
www.w3.org/Style/CSS10/

Code Style - CSS Style Guide - Includes a cross-platform font sampler, information on media stylesheets, FAQ, and a glossary.
www.codestyle.org/css/

CSS Naked Day - On April 5th, simply remove all CSS from your website, stripping it entirely of its design. Promoting web standards, plain and simple.
naked.dustindiaz.com/

css-discuss Mailing List - Practical discussions of CSS and its use. High volume list.
www.css-discuss.org/

CSS3.info - Newest developments in CSS based webdesign.
www.css3.info/

Dive into Mark: CSS - Archive of postings to Mark Pilgrim's weblog.
diveintomark.org/archives/rooms/css

Eric Meyer - CSS - Articles, tutorials, discussion and resources for CSS.
meyerweb.com/eric/css/

EServer TC Library: Cascading Style Sheets - A collection of dozens of rated, reviewed online resources for developers who work with cascading style sheets in web and information design.
tc.eserver.org/dir/CSS

Web Developer's Virtual Library - Cascading Style Sheets - Teaches how to use CSS to improve the look and structure of HTML pages. Links discuss how to use CSS to avoid table layouts, colors, fonts, and layers.
www.wdvl.com/Authoring/Style/Sheets/

WebmasterWorld: CSS Forum - Discussions on layout, compatibility and trouble shooting.
www.webmasterworld.com/forum83/

W3C CSS Working Group Blog - News, announcements, and opportunities for discussion from the group working on the next CSS specification. [Atom]
www.w3.org/blog/CSS?tempskin=_atom