This project is really exciting and we are seeing kind of an acceleration in interest on it. A few months ago, and in late 2015, we are talking about the concept of connecting data loggers to blockchain. i.e. sun to blockchain flow with the whitepaper. Now I estimate that there are about either 100-300 people working on this on different chains, different cryptos and also within the ElectriCChain project itself. I was over on the IOTA chat, and there is a lot of interest now in China regarding IOTA (hundreds of people). It is only a matter of time before that interest or a subset is connected with SolarCoin as well.
Cheers,
-lfloorwalker