What are doing in Africa? I'd love to talk to you about it sometime. I'm doing some work there as well construction/water&waste mgmt. We'll soon make some very early stage efforts to enter the energy industry as well. See my profile for contact info.
should also see txtGate http://github.com/niryariv/txtgate for a good model of turning a single device into an sms gateway and data collection device. Good luck, keep us updated.
I should mention I first saw txtGate here on HN because the developer is a member. More of a proof of concept than anything else, but a great idea.
