I've tried creating communities before on another site related to Genealogy but all they wanted to do was exchange information about the trees they were researching rather than chat about anything in general. They post "Hi I'm Bill, I'm looking for information about X, Y Z, email me" and that's it.
BTW Are those posts on your message board posted by the people concerned? They appear to be promotional phrases or perhaps comments from telephone calls instead. Do you chat to your customers in person or on the phone? If so, what interests them?
You can create communities on anything but it's supply and demand as always. Here's a forum that works on a wider topic though as I suggested above. Googling for 2 minutes got me this vBulletin based forum.
http://forum.doityourself.com/
