In the beginning, pop culture wiki TV Tropes licensed its content with the Creative Commons Attribution-Share Alike license for free content.
I suppose the morale of the story is, if you contributed to TV Tropes before summer 2012, you should know they're distributing your content under a license that you didn't give them permission to use.
In my very rough ideas on how we'd do this, users who are logged into our NNTP server (using the slash username/password) would be auto-posted to the site as a logged in user, while everyone else will come in as AC (we'd import headers and display them as well).
My thought here is to write the site out as a series of UUCP USENET batchfiles (the fileformat is simple), and just import straight into INN which means that slashcode would essentially operate as a second server to INN which in turn can be fed to the rest of USENET in a predictable matter.
In USENET terms, the SN feeds would be moderated, so every post would turn into an email which slashd can process one by one, and run them through spam-assassin; unautheticated posts from USENET that fail spamassassin will just be discarded silently; posts that pass will be passed back into slashd, and installed into the database, then echoed back into INN as described above. Our posts will have plenty of metadata allowing people to re-create the database from scratch if we ever have to close our doors (we could probably use some control message magic to make moderation scores appear as X-Headers, and then cancel out the old posts in the feed. This might cause issues w/ some news readers as not many of them implement Replaces/Supersedes very well).