I have often quoted this story but found it hard to find a reference - having been given it anecdotally myself but The Economist have an article that discusses how fishermen in India have found that mobile phones can change their businesses.
I have used the story because it shows how the most unexpected of consequences can arise from the introduction of a technology. In this case the introduction of better communications has meant that a marketplace has operated more efficiently. this could never have been seen as a consequence of creating SMS or introducing SMS to India.
When looking at mobile education in schools a similar surprise seems to come from the trials in Wolverhampton. An unexpected consequence of introducing hand-held devices to the classroom and giving one to each student has been better communication about school between students and parents. As far as I understand it this has been as a result of the fact that students have been easily able to show parents what they have created that day at school - because it is in their pockets.
This could never have been foreseen by the Dave Whyley and the team - but what a great outcome.