I think something that might not be helping to attract new members are the "members only" areas that are hidden to guests. The casual observer could run across VV in a search, read the relevant thread(s) then go on their way, not realizing that there is more community here than they can see. I'm not sure how to rectify that while still maintaining the level of comfort that there is in having the "members only" areas. I do REALLY like that the random chat thread, etc, isn't visible for all of creation to see, and I think there is enormous value in having the specific health threads by approval only.
I haven't logged out lately, so I'm no longer certain which sections are visible to non-members.