Hi ericnute,
I'm not aware of any way this is possible out of the box. I would suggest you reach out to our Professional Services team for a custom engagement. I have also moved this post to Dev Nation for better exposure.
We have reply-by-email functionality, which allows you to post a message via the mail protocal, but we do not have support for NNTP. You could set up email subscriptions and then allow users to reply to posts by email. If that doesn't get you what you want, then I would also recommend you reach out to Professional Services to discuss a custom engagement.
