Lee Grady at Charisma Online posts here about MegaVoice, a company that makes a solid-state, handheld audio player device, similar to an iPod. The MegaVoice is preloaded at the factory with audio that can’t be changed by the user, and is capable of running on solar power. Using these devices, illiterate people all over the world can now hear the Bible read in their native languages. How cool is that?
More background here.
Clif Guy sporadically 
I’ve seen a similar device for audiobooks at local bookstores – it’s not solar-powered, but it comes preloaded with an audiobook and a pair of cheap earbuds. If they weren’t 50 bucks or so (content is the expensive part here), I’d get one to take apart 🙂