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Here are two links to posts dealing with how to post pictures on Black River Fossils forums.
1. How to Post Pictures on Black River Fossils Forums by ditchweezil
2. How to Post Pictures on Black River Fossils Forums by Daryl
I am planning a chat component but its not finished yet. If you want to contact any member, use the Contact Us form. There you will see a dropdown list of every member of this site and a place to type a message to them. The site will send the message to the member you select. Its not exactly private messages, but its pretty close.