There are a number of Mammillaria Fora in existance. Apart from the Forum that is part of the German Society (AfM) website, the two other main ones (ours and Mammillaria.net) have no specific affiliation with a Society.
Certainly in the Society based in the UK, the Mammillaria Society, wishes have been expressed for a quicker level of feedback that to await the next Journal. Although there is nothing to stop members of the Mammillaria Society starting a discussion on our Forum, since they don't have a specific one of their own, there is nothing here to suggest that this is a good idea. The AfM do have a Forum as part of their website, but apart from a message from their President, there have been no postings as far as I can see.
I believe that it would be sensible to establish two subfora for discussion of articles in the Journal of the Mammilaria Society, and in the Journal of the AfM.
I don't know how many Forum members are also members of one or both of these Societies, but I think it would increase the sense of Community to do this.
What do you think??