I like it and think its pretty cool!! I was thinking about the same thing, but I just couldn't think how my idea could be done... anyways I think thats perfect!! Even tho, I wouldn't say ONLY 5 or 6 members... I think that those 5 or 6 members that volunteered and chosen by the admins could have the possibility to pick more people (by votation) and add them to the group... for instance lets say that the 5 members of the group are:
Brody (just to name the people that come to my head)
Lets say that these people are chosen by the admins, and someone thinks about adding me to the group, and so they vote... and so lets say the votation wins, and, if I accept the invitation, I get added to the group. I think this could be an idea to not only have a small group of people with a few ideas... I'm not saying that they whole site needs to be part of the group, but the people that the group think would help.
Other than that I think you have the whole thing pretty darn well planned!!
If I have anything else to say, I'll say it
Odi et amo. Quare id faciam, fortasse requiris.
Nescio, sed fieri sentio et excrucior.
~Harrie's proud brother!~