I’m going to use html5 and css3 for the new project although html5 is under development
I believe is really worth to develop an application with this new technology and follow its growth and success together with my new project.

I believe that html5 and css3 will soon going to be stable and it will soon be fully supported by different browser.

Below is a list of cool links about HTML5.

HTML5 TUTORIAL
http://diveintohtml5.org/
http://www.html5rocks.com/
http://www.w3schools.com/html5/default.asp

HTML5 DEMO
http://html5demos.com/

HTML5 TOOLS
http://html5.validator.nu/

HTML5 WORK GROUP
http://www.whatwg.org/