'Oh, and .PDF is not accessible. You can use tags to make it sorta-kinda work, but it is not an acceptable solution to the problem. The fact that Mark would try to tout that makes me wonder about his qualifications and motivations.'

PDF reader has a 'Read out loud' feature that will read out text. Works surprisingly well (I tried it once out of sheer curiosity and just checked for good measure) for regular articles etc. It can get confused by columns of text though if you don't pre-select the text to be read out first.