Catholic Everything, which can be found here, has the potential to become really something. It is what it says: a Directory of Catholic everything. The list of categories gives you a clue: All freebies, Blogs, Business, Education, Family, Media, Organisations, People, Pregnancy, Products and Travel.
It's very US-focused at present (so advertise on it!) and has a few too many Google ads at the top, but, as I said above, this could end up being a really useful resource.