how HTML5 figure and figcaption should/could work

I have written some stuff down about how figure and figcaption could work
for screen reader users, as currently it is not accessibility supported in
browsers or AT.
I think there may be the need to create a new role to represent figure,
probably an ARIA landmark role.
http://www.paciellogroup.com/blog/2011/08/html5-accessibility-chops-the-figure-and-figcaption-elements/

I am asking for feedback from users and implementors.

any feedback would be appreciated
-- 
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