SMS seems to be gaining momentum – it's now 75% of the non-voice revenue component of mobile operator revenues, (only 20%) according to a report by Research and Markets.
That's because it is a real-time memo service. In the UK, professional educators use SMS as a pre-screen for potential truants – absent children without reasons are SMS'd and asked to call back before calls to parents. I think the big debate has got to be, how does this fit with the usual policy of no-cell phones in schools?
At one time, it was no calculators during exams, which of course is no longer the rule. Is it time to revisit the no cell rule? What are the implications?