To be honest, all the 'conjugation' pages need to be rewritten so they're more like this: http://www.renshuu.org/index.php?page=grammar/individual&id=478
There's just not enough time, as I'm spending most of my time on the site's redesign. I'll go ahead and take of this one, but let me know (send me a private message) if you're interested in helping with the other pages.
I understand the causative and passive forms when I hear them, but I don't feel confident enough in their corresponding particle usage to use them heavily in my own speech (or at least, not in circumstances where I need to use particles, anyway). Could we add such an explanation to this page?