HTML5 and CSS3 (compatibility with IE)

http://outsourceage.com/html5-and-css3-compatibility-with-ie/

Yes, You Can Use HTML 5 Today!

http://articles.sitepoint.com/article/html-5-snapshot-2009

A Preview of HTML 5

http://www.alistapart.com/articles/previewofhtml5/

Ultimate Collection of HTML5 and CSS3 Resources

http://www.smashingshare.com/2010/04/28/ultimate-collection-of-html5-and-css3-resources/

What are Web standards and why should I use them?

http://archive.webstandards.org/edu_faq.html#p213

Answers.com - Starts Answering Questions On Twitter

http://techcrunch.com/2010/04/20/answers-com-twitter/

Steve Jobs presents iAds in HTML5

http://bossingaround.com/steve-jobs-presents-iads-in-html5

CSS Interview Questions and Answers

http://www.aspskills.com/css-interview-questions-and-answers-what-is-css-1-css-stands-for-cascading-style-sheets-and-is-a-simple-styling-language-which-allows-attaching-style-to-html-elements-every-element-type-as-well-as/416/

HTML5 Media Player

http://www.clonestop.com/webmasters/flash-player/909-htm5-player.html

Ten Tips For Optimizing Wordpress for Search Engine

http://networkedblogs.com/31Frx

Great WordPress tutorials

http://perishablepress.com/

HTML5Doctor - helping you implement HTML5 today

http://html5doctor.com/

Compatibility tables for features in HTML5, CSS3, SVG and other upcoming web technologies

http://a.deveria.com/caniuse/

A Selection of Supported Features in HTML5

http://molly.com/html5/html5-0709.html

Online CSS3 Generator

Nice tool for fast coding CSS3 that you should bookmark. CSS3 Generator is an online that will help you generate CSS3 code fast and easy. You just simply select one of these tool from the list (border radius, box shadow, text shadow, RGBA, @font face, multiple column, box resize, box sizing, outline, selectors and gradients)

This tool will generate the ready to use CSS code for you and also shows a list of supported browsers.

Link: http://css3generator.com/