Would anonymous communications, widely recognized as vital to democratic societies, be allowed on urbit? If so, a federated wiki site integrated with %hermes would let you launch a moon from a planet server from an http client as a wiki browser.
The wiki browser expands the internet of things to data objects. Wiki is an editor that manages hypertext in json format. Hosted on moons, a planet would make content discoverable by publishing sitemaps. As clients, 64-bit ships (moons) can be used to track data provenance, ownership records and titles in decentralized data markets.
Moons are issued and controlled by their parent planet. This app proposes a model in which planets can opt in to issue subkeys on-demand through https. A parent planet may see Moons launched on their server and can revoke moons at any time. A moon would automatically carry with it a cryptographic guarantee that its communications are secure.
Federated Wiki provides many opportunities to develop data-wrapped visualizations that evolve relative to the information a page abstracts. With pages digitally signed by a unique moon, an origin point for data could be located, and planets could collect and analyze data representing scarce objects, local and regional markets or network effects.
Many of Urbit's current features can already be modeled with wiki. By implementing provenance, immutability, and reputation over an SSI network open-source can stay open while providing a low dimensional topology of information fusion 
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Sites could be hosted as a free service or clicks could be integrated into microtransactions through purchases that expose a certain number of pathways through the wiki before hitting another paywall.
Where is wiki from? Where might it go to? We asked and answered these questions in a 2005 Wikimania keynote. Our answers hold up. Some guide our work today.
Rui Zhang, Yafeng Lu, Katherine Adams, orge A. Sefair Haley Mellin, Miguel A. Acevedo, Ross Maciejewski