Hi Ian, ARIA fills the gap in HTML with role="main" http://www.w3.org/TR/wai-aria/roles#main
I agree that an explicit element would be nice, but the powers that be have rejected the idea. -- with regards Steve Faulkner Technical Director - TPG www.paciellogroup.com | www.HTML5accessibility.com | www.twitter.com/stevefaulkner HTML5: Techniques for providing useful text alternatives - dev.w3.org/html5/alt-techniques/ Web Accessibility Toolbar - www.paciellogroup.com/resources/wat-ie-about.html
