It seems to be dominated by a few individuals. That is not uncommon, I am beginning to realize, as I participate in a few on-line communities for about three years now. What happens is a person with an ax to grind, or one who takes glee in stirring the pot, is on the board, all the time, and if not weeded out by the moderator, chases out all the 'normal' (productive, positive, respectful, etc) posters.