Well, I think a nice Wiki will in it self generate some traffic. And as variant says, the forum style howto/tut section is a bit of a trun off (no offence ;)). the forum/post style howto section maybe be a little hard to browse - where as a wiki could have a "propper" index page with propper sections/topics (if you understand my fuzzy description). For what I've seen wikis can be a little more flexible/structures than a usual post, after all BBCode is a bit restricted, eg iirc wiki can do tables - BBC can't.
Whether people will use it effectively is questionable -but at least some of the people would use it