Janet you are so right. We're facing a situation at our college where the course has been created in WebCT. We were confident that students have been fairly competent in copy & paste to extract the text from WebCT and paste it into Kurzweil or other screen readers - and then use Dragon (version 9 is about 98% accurate) to speak their answers.
Until we encountered OPUS (and perhaps someone has a thought here). It is courseware development that captures the screen and displays kinda like a jpg - hence no text to copy and paste - totally inaccessible for our students who need screenreaders.
So we've gone to hiring a person to type in txt everything captured in OPUS and embedding in the course material so the screen readers will work.
And I'm happy to say our college has discontinued OPUS and mandated the software selection committee to make 'accessibility' part of their checklist.
one step forward, and 3 behind it seems some days...