this is a link dump…
Stuff I still need to read…
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http://www.marcozehe.de/2008/02/29/easy-aria-tip-1-using-aria-required/
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http://www.marcozehe.de/2008/08/06/aria-in-gmail-2-enhancing-the-chat-experience/
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http://www.marcozehe.de/2008/07/16/easy-aria-tip-3-aria-invalid-and-role-alert/
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http://www.marcozehe.de/2008/03/23/easy-aria-tip-2-aria-labelledby-and-aria-describedby/
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http://www.marcozehe.de/2008/03/25/a-follow-up-to-my-easy-aria-tip-2/
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http://www.marcozehe.de/2010/02/10/easy-aria-tip-5-aria-expanded-and-aria-controls/
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http://www.marcozehe.de/2013/04/24/easy-aria-tip-6-making-clickables-accessible/
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http://www.marcozehe.de/2013/08/02/how-i-came-to-grudgingly-accept-aria-hidden/
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http://www.marcozehe.de/2013/03/08/sometimes-you-have-to-use-illegal-wai-aria-to-make-stuff-work/
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http://www.marcozehe.de/2012/02/06/if-you-use-the-wai-aria-role-application-please-do-so-wisely/
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http://www.marcozehe.de/2011/12/05/from-wai-aria-to-html5-and-back-or-maybe-not/
Some Tools to actually "see" what you're doing, more in web components punch list,
- Firefox DOM Inspector Extension (Accessibility Tree, Accessibility Events)
- XCode Accessibility Inspector
open '/Applications/Xcode.app/Contents/Applications/Accessibility Inspector.app'