I had GT do a custom job for me that does something similar with GList and GForum....I suppose that LinksSQL could be used instead. We had similar desires....transform a magazine like newsletter into a post one-at-a-time articles with the ability for GF members to comment back on GForum and have a HTML email subscription service open to the public (our GForum is not open to the public).

I don't know how involved the custom work was, so I don't know if it could be a plugin or not. Aki did this for us and am very happy with the result. We are just now launching this. http://www.pecupdate.org . Still doing a tiny bit of bug fixing, but pretty much done.

I hope this helps.

Dave