There is a thriving e-mail list discussing Nn3 and other N scale narrow gauge topics. If you are at all interested in the subject, I would encourage you to join the list.
Membership is free.
This may take a few days depending on availability of a moderator to actually add you to the list. The Nn3 List on Yahoo is limited to receiving posting from members only, this means that you have to send messages from your subscribed address only and no other address will work. Attachments are stripped from the mail as we do not wish to pass viruses to our friends. This is an open discussion group so all replies to mail sent from the list are set to reply via the list rather than to the author of the message. There is a file area where you can post pictures or other files you wish to share with other members.