Sideways are an app developer that don't get the attention they deserve. I've just come across a demo video for a new piece of software they have available for license. It's called Buddy Reading. How would you like to use your iPad to read a story to someone even though they're in a different location. If Buddy Reading is integrated into the reading app, you can do it.
Sideways have a number of other clever products. I think they're worth a look.