Hi Russell, nice to see you aboard - there is certainly a huge variety of expertise on this seminar and I want to thank Jennison and Catherine for thinking of it - I don't want it to end! (I like how the messages pop up into my mail so I can read throughout the day - in between invigilating!).
We use webCT (now Blackboard Learning Systems) at our college and for the most part (except all the button are visual and some of the interactions are shown through small, blue letters such as when you want to create a link to a document within the system) find it not too bad.
However, unless someone knows something I don't, students need to copy and paste text into a screen reader - it won't allow a screen reader to work within the frames. So we put the link for the free download of readplease at the beginning of each page and give students directions.
The BIG problem is that faculty may be creating curriculum using programs within the webCT environment that are not accessible - for example, OPUS is a program that all our trades teachers use to capture demonstrations with text - like a jpg- so there is nothing to copy and paste into a screen reader for the tons of students with LD in trades programs.
So we've had to hire people to 'read' the text within that program and create MP3 that we embed in the material so students who need to hear it can.
We have discontinued OPUS for the future development but we have hundreds of high tech courses already created....