We have our own intranet server with wikis on it. It is accessible from the outside, but we don't host our webpage on it. We keep most of our data in sync there, it's great for collaboration.
We marked some of our documents public and we want them accessible to the world, on our "hosting" based website.
We want to "mirror" the public articles (the ones that are visible when nobody is logged in) from this server in our office to our website somewhere on the internet.
Note: It would be nice to have some kind of cron job or something to have the hosting pull public data from the server every 4-8 hours or so to a browsable copy on the hosting service. There the website can link to it and display it in a different manner (we use different css, etc)
Neanderthal solution: I was thinking of cloning the public intranet site with something like "Teleport pro" (an old 1997 tool that still works wonders:) and then copy it to the website.