Since I read "less walk more talk" I've become more aware of how mobile communication changes Africa. It's my impression that so far, voice, person to person SMS messaging and some information services again based on SMS (e.g. what are the prices for a certain goods in a certain city) have made the most impact. Also, the "mobile crop insurance" trial I've reported on here is an interesting project. And now, Grameen, Google and MTN have started new services to bring knowledge to rural areas around farming, health tips and trading. Again, based on SMS. Here's a video with some details. And for some more details from the inside perspective, have a look here.