Hmmm. Excellent points to consider. Thanks. Sorry I couldn't find this link earlier.
But how do you get around the typical username/password authentication to log into one of your accounts somewhere? Wouldn't they need to be ADA compliant also? Or does a good text-to-speech reader read the text and prompt the individual to type their info?
If you want to make sure you'll be ADA compliant, there's some information on creating an audio Turing test here. I responded to that thread at the bottom, but I'm not familiar with that message board and I might try creating a new thread that gets pushed to the top of the list where someone might actually see it.