I am devoted to spending the remaining of the year at beefing up the documentation for the core Connections plugin. I added a doc page for the Connections : Tools admin page last week. This week I am working on the Connections : Settings admin page doc page.
As for creating a how to for a membership site, I had no plans on doing that because Connections is not a membership plugin. Generally users use the core WordPress registration to create a minimal membership site and then use the Visibility status of posts to define whether a user can see the post depending if they are logged in or not. Other users who require a more robust membership site use membership plugins like Restrict Content Pro. In essence the directory is only one part of their membership site.
Something to consider and hope it helps!