Seems like the current consensus is a social group. It's certainly the easiest to set up and it should make it pretty simple for other DDC members to catch back up whenever they see this thread.
We need to decide if we want the group to be open or closed. And, we need to have (a minimum) of two group leaders. I volunteer to be one. Who else is willing? If we make the group open it seems like the commitment is really minimal.
Here's some info on social groups that I found:
Social Groups can be Open or Closed:
Open Membership: Anyone may join by clicking the "Join" button.
Closed Membership: Membership is by approval. Clicking the join button initiates a PM to the Group Leader requesting membership. The Group Leader must approve all new members.
How To Start a Social Group
Read the information, guidelines, and rules below.
Post to this thread to propose a new Social Group and apply to be its leader. In your post, include the name of the Social Group and whether it will be open or closed. Each group should have two volunteer group leaders.
How Social Groups Work
Social Groups are moderated by a Social Group Leader. Group Leaders are responsible for upholding the integrity of a group by making sure that participation by members follows the User Agreement.
Each Social Group will have its own forum and the group page will list the members of the group and include a "Join" button to allow new members to join.
All content in all Social Groups is visible to the public, but only group members may contribute content and participate. For example, only members of the "Minnesota Natural Birthers" group can post in the "Minnesota Natural Birthers" group forum or upload photos to its gallery.
How to Use Social Groups
After you've joined one or more Groups, they'll show up in a box on your profile page. When you tag Groups, they can be promoted as "Related Groups" in relevant areas of the site in the same way that Related Forum Threads and Related Articles now appear in the right column of various pages.
Group Leaders are the members in charge of a Social Group; the member who creates a Group is the first Lead and may appoint additional Group Leaders.
What can a Group Leader do?
Receive join requests (for closed groups) and approve or deny them.
Edit the Group description and change the thumbnail image.
Ban a member, making it impossible for that member to re-join the Group.
Remove images from the shared gallery.
Send a PM to all members at once.
Promote other members to Group Leader (there can be more than one leader in the same Group).
Demote him/herself to a regular Group member.
What a Group Leader can’t do?
Change the name of the Group
Demote another Leader back to a regular member (this must be done by the member or a Mothering Administrator).
Act as a moderator within the Group forum (e.g., delete/edit others' posts and threads, etc.).