if you are looking for a platform for having discussions about a given topic, a bulletin board like phpbb is the exact thing you need. very few of the current crop of "social media" platforms work very well for a true discussion based system like a bulletin board system does.
and, of course, here at phpbb.com we think that phpbb is the best of the bulletin board softwares out there.
I is secure, easy to setup and use etc. etc.
oh, and it is free. if you are serious about it, you need to have a domain name and a hosting account and install it yourself with the files from here.
as to whether your subject is a viable one for a discussion board, I have no idea what FileMaker is.
however, if you can make your board unique in some way , offer your members something different or better than the competition does, they you can make a success of it.
I'm baaaaaccckkkk. still doing work on donation basis. PM your needs.
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