Hmmm, now that's an interesting question. I believe the movement is in the formative stage. The apologetics are being formed, the arguments hashed out and the reasoning solidified. This community is superb at that. But I don't know that polygyny is ready for the primetime. I personally feel that we're building for some future development, however close that is to being realized. It would be nice though to feel like we were a growing community. It seems like a lot of people introduce themselves to the site and then disappear.
I know when I started researching polygyny, I was very interested in the experiences of those actually practicing it. That of course is very hard to come by, especially a man's perspective and even more so a Christian man's perspective. I guess it would be interesting to see BF blogs, even if they were anonymous, from those actually living it and especially from the men. This might be moving the site from its strength, complex theology, into a more practical side but I think it would encourage more involvement and drive people to that theology.
Also, I think a kind of code of ethics should be formed. Maybe a checklist of sorts. Something like the Love Not Force thing but maybe a little more detailed. Guidelines that say things a Godly husband would or would not do. So a guy could take his situation and see if it had the red flags of a flesh driven lust or if he was acting in a Godly manner.
This is going to sound weird but, is it possible to have a counter that shows how many members we have and how many plural families are associated with the group? I really think that the best way to promote the idea, and encourage the initiates is to let them know that it is being lived and how frequently. It makes this interesting Old Testament idea more accessible and may make many of the women who are being exposed to it less resistant when they can see that there is a culture supporting it.
By the way, I thought the Facebook move was excellent and gutsy.