Likely word is getting out more. Solarcoin has flown under the radar and is slowly getting more attention.

As far as development goes if you follow the slack channel you can keep more up to date as that's where most of the talking takes place.

The biggest current development would be the new wallet is in testing. Lower memory usage, faster syncing, security updates to bitcoin core 1.5.

Only today they announced connecting blockpass protocol to the solcrypto dataloggers. This should help securely verify ID for data logger participants while keeping information private and secure. This is all development leading to creating a global solar picture stored on the block chain, which itself is of massive value.