Yeah, it might help if you read more about the Directory, for sure. If you're not a member of the private group already, that would be a great place to start.

The point of the Directory is to provide a list of great Ning Networks, by Category - - while at the same time giving NCs a place to meet each other, exchange services, ideas, etc... A place where Community Seekers can find you. And a place where Network Creators can advertise and show off your networks to the max. So, the more Network Creators and their Communities, the better. The more members (Communities) we have, the better Google and other search engines will index this site. The more members we gain, the more time I will spend on Search Engine Optimization and publicizing. Once we are large enough, our goal will be to get potential new members to our networks.

The Directory is a place for Community Seekers (potential new members of our networks) to browse a categorized list of Communities, a place to search on certain search fields to find their wants/needs in a new Community, and a place for them to preview our networks, to then move on and JOIN. I hope this helps.
Best to you,
Jen