I agree completly with Alan : most of the PowerPoints aren't compliant (
PowerPoint don't enforce the tagging of the images ...).
I understand that a converter can be a solution to convince somebody,
but it is a false one because I doubt the converted PDF will be more
compliant than the original one.
My point is : this accessibility issue is a way to force a commercial
software upon us. Don't use LaTeX or PDF, they aren't accessible !
We must find a way to create compliant documents with our tools (LyX,
LaTeX, PDF ...).
I don't think it is so difficult.
Siegfried.