Thanks Allen. I should mention that the site has basically two parts and some members only look at one, the messages. There's also an extensive collection of files in the section by that name. Some are documents and some are photos or sets of photos. I can assure you that there is a lot of valuable and interesting information there.
The basic setup is an email group. Someone finds something of interest, and they send an email and it goes to the rest of the group members. They can each choose to receive each message as it comes out, or periodic "digests" of messages, weekly for example, or none at all, if they prefer to check the site and read messages at their leisure.