The RAK group is managed (all volunteer time) by Gina (aka ginapier). Basically once your membership is approved you gain access to the RAK forum. Within the forum is a link to an Excel spreadsheet with all the names and addresses for the members.
There really are no rules, but there are committees & games that help get you RAKing. For instance, you could join the Welcome Committee or the Birthday Committee (people send RAKs to the new members and to all members on their bday). There is also a RAK challenge that helps you choose people to RAK.
Since it is all volunteer time (and Gina travels *alot*), getting membership does take time, but be patient...it is worth it