If there's something like this already let me know. I'd love to create a subreddit where people could submit web pages or documents that are inaccessible for whatever reason, and then someone else could upload an mp3 in which they would read/explain what was written.
I work for web accessibility services for my college and I recognize that very few people even consider what a screen reader will and will not be able to read when creating a document or website. I'd like to help out where I can