As an aside, it occurs to me that another way to build a kind of marketing/informational tool would be to create a section of OpenACS.org where community members could maintain project blogs, i.e., they could describe their project work as it unfolds. The problem with discussion boards is that it's too easy for other folks to jump in and create distracting tangents.
I have an idea for a UI that would allow the best of both worlds; one of these days I'll get around to posting the idea.