I've been considering a 'mixing resources' area, probably with links to other sites, and to books, videos, etc.
I think it would be arranged as "Books and Videos", "Websites", "Podcasts", "Other" with the understanding that each post would be about only one resource, with people free to review and comment about that book or website on that thread. That way, things can stay relatively easy to search/browse.
Any other categories to include?