Resources
•http://dev.opera.com/articles/view/introduction-to-wai-aria/
Probably
the best introductory article online .
•http://wiki.codetalks.org/
Excellent
set of ARIA test cases.
•http://paciellogroup.com/blog
Great
all round accessibility resource, with emphasis on ARIA.
•http://www.w3.org/WAI/intro/aria
Understandable W3C introduction to ARIA.