Hi Crash.
While this may seem like a good idea, there is no possible way it would work out. I'm afraid that this is one of the few suggestions that I can flat out say will never happen.
As far as I know, newsgroups don't really have a permission system like the forum does. That means that we would not be able to limit participation to only members. When you sign up with the forum, you agree to the Terms of Service, which state that you agree to follow the rules. If people could participate without agreeing to follow the rules, it would basically destroy AD.
We will soon have an RSS Feed setup implemented in the forum, and that will accomplish the update-by-interval that you mentioned. But, RSS Feeds are for reading only.
Thanks for the suggestion.
Mike