Wow!! I might be the last one to know but Wikipedia is currently working with spoken articles for people who can understand but not read English and also to listen to articles during workouts, house work etc(
WikiProject), a pretty good idea I would say, and getting them on its mobile sites would be awesome!!.
Currently (as far as I know) only a few of the articles are spoken and Wikipedia highly encourages you to generate spoken content. Articles with spoken content will have a speaker image right by the name of the article ( as in the image)..
An article that I came across is
Service-oriented architecture
