Depending on the questions, some (the more difficult ones) do end up getting answered by him. But the simpler questions get answered many times by someone in your local store, or another person somewhere in the team.
As far as the point made about others being able to see/read the answers given, I agree that is the advantage of a forum, but as a widespread source of information, it's just not practical. The website RK has put together is much more user friendly than a forum, and accessible to most. I'm assuming frequent questions will be added as time goes on, and some questions may continue to be answered here, but as far as a timely thought out system to respond, the website is just more functional and able to handle task. And as the RKTG said, they do monitor this forum for issues/questions/concerns.