I added a review to a book in Open WorldCat after reading about this functionality in Catalogablog. I’m not certain how having a “post a review” feature or any user posting rights makes this a wiki. Maybe once my comment is approved on this post [if you see it, it’s been approved] I’ll know more. I think these features are great, don’t get me wrong, but a wiki is something pretty specific and at first and second glance, this is not in any way a wiki.