If you want people to use these scripts, I think the forum is essential. I had no problem installing phpdig on my Linux/Apache website, but did have problems with it on my Windows based site. Without the forums for support, I would have been forced to look for another website search engine for that site.
Now, if you want the forum to be more than just a question and answer place, it takes participation by the members. How do you get that? I think by doing what you're currently doing - asking thought provoking questions to try and stimulate discussion. If you keep at it, I think it will really take off. It just takes time and patience.
