Is Sonm near a development milestone? When is testnet? Mainnet?
The best way to find this out is checking out their roadmap, on their website
Yes you're right. The best to see the status of the project is by visiting their website and their blogs. Actually you cannot just beleive on people what they are saying about the project. Best of the best is to believe to the project and their future plan for it.
I would say that SONM has the best ico this year if you know how to properly trade it.
Just monitor the github of the Yandex devs involved in this project. They are tirelessly working in the background. Once they are successful or about to test, I'm sure the price will reflect it.