just create them on-the-fly as submitted. The problem will be spam, I would have an API key that's created upon captcha signup that's attached to a submission, and opens up new capabilities. Maybe too complicated.
Ideally I could create a plugin, that would load a new random page from category UI after every press, then at the top of the browser would display some metadata attached to a page, like a "further info" link.
Perhaps you could create a category tree that users populate, and then allow random tags to associate -- like YT videos - choose a category but then attach madeup tags - that would be best.
In a sense, you already have, by requiring the content to be hosted elsewhere and releasing the pulling code. There is beauty in simple tools like this one. Kudos.
maybe just adding a basic feed aggregator, so that you can easily see your friends' updates, pulling in their disqus comment threads (I have no idea whether this is feasible, i've never implemented disqus).
https://github.com/saibotd/embeddit