I would also say join the discussion. There is the Moodle accessibility group you can join at http://collaborate.athenpro.org/accounts/register/. The group is working well with Moodle HQ to improve Moodles accessibility and let the experts Martin mentioned argue about which approaches are the best For Moodle.
General developer forum
How much of the AA standart from the w3c is done in moodle 2.4 and 2.6?
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