Doulos,
I think what you are asking for is blessing from PB staff to create this environment as a Puritan Board sanctioned activity. I would suspect that given how we are jealous of our reputation that we would not likely explicitly bless such an endeavor at the present time.
That said, there is nothing preventing anyone from starting up some new activity that includes the word "Puritan" in that activity. If the activity flourishes and is in keeping with our PB culture, there may even come a time that we would recommend the activity to others or even directly sponsor it, integrate it within the site, etc. After all, we are always thinking about new features or efforts that will drive more eyeballs to our site and increase the edification of members by new content and discussions.
One vital requirement, outside the assumption of Confessionalism that goes without saying, in my opinion for any such future sponsorship is that the participation in the activity is not cloaked behind usernames that hide the identity of participants. PB strongly holds that all are accountable to their local church authorities, so if you were to start this activity up in the hopes of it eventually becoming something PB would adopt, participants in the activity would have to be able to be identified, along with church affiliation, in some reasonable manner. Just a suggestion.
So if this is something you are passionate about, then let that be your guide and leave the outcome in the providential hands of the Lord.