Forum .LRN Q&A: Re: Making Online Learning Accessible - Guidelines Released
Here is a cookbook like accessibility resource (uses Movable Type in some examples):
that is very well done (it wants to be read and not just skimmed). Maybe it will motivate some to start making their OpenACS sites more accessible.
P.S. Sadly the Wimpy Point version in 4.x has some major problems, which makes it almost unusable (I posted the problems I found in the old sdm)