I think you made a point against yourself there. If it has no barriers to entry, then what's wrong with publicizing it? Obviously, one person has already done it. Part of what entrepreneurs often do is think their ideas are unique. But someone has just proven that its not, and I think you'll see others will as well. Being open about your idea and getting feedback is not really likely to lead to a bunch of new competitors. If there are no barriers to entry, then your business is all about the long haul and other factors, not surprising the world with it. Execution is where the battle lies now. Getting all the help and feedback you can get and getting the work done is more important than keeping it all inside.