There are too many collaboaration areas for the start, which is the reason why they are all empty. My experience (I used to admin CompuServe) tells me that you need some "critical mass" to start free flow of infos.
The big thing is how to guess how many people come in here once opened to the public...
And BTW: "Collaboration area" is not understand by many people. Why not call it "forum"?