Genealogoly and CSA and PSA mailer. I think if you have active and good want to work members you can communicate with them by personal way like social network or via skype. Better way to follow all of them personaly in genealogy clicking their points and in this way you can see what do they do so you can give them personal help and in this case is better the personal communication. CSA and PSA mailer is better for common information and communication.
