Just a few ideas... Excuse me if I'm writing something wrong...
1) PARSER + FIXER: It would be interesting to add an html validator to parser the generated html code, and if something is wrong, but easy to repair, fix it.
For instance, when showing a forum message (text from the database, written by a user), maybe some incorrect nested or unclosed tags could be there... So, to be AA compilant, it should be used a "magic" html fixer. Just to repair that "easy" fixable mistakes.
It could be also a new button into developer support toolbar, but the first Idea is an automatic parsing.
2) TESTS: To improve maintenance, and fast developing/deploying tasks, and so on... Could be possible to write specific WAI-AA validation tests? Just to launch those tests and check that everything is ok.
