Re: The Webroot Wiki has been inactive for a long time.

I think it will be a case of "if you build it they will come" - if you put more details on there and build it up yourself, then it will attract more attention.  One thing you should do is put a notice on there that this is a site you created, and not an official Webroot page.  That will help let people know that it is ok for them to contribute.  If they think it is a corporate page then they might be leery of editing it.