Regardless of the steps between now and "going public", I think you owe it to them to warn them, with proper opportunity for response, that you're planning to p

Regardless of the steps between now and "going public", I think you owe it to them to warn them, with proper opportunity for response, that you're planning to publicize it. They're dropping the ball by not responding to your initial e-mail, but to just go public with it seems premature.