Added another FedWiki slate for academic/teaching stuff, as a parallel to http://biro.erhetoric.org. But that's not the news.
I figured out how to handle the wiki farm angle of things. As explained clearly in Deploying a Wiki, you can point more than one domains or subdomains at a single instance of FedWiki. Explained clearly, yes, but it took me a while to figure out how to do this.
I am running sfw.mcmorgan.org on a droplet at DigitalOcean. I thought that a new FedWiki would require a new droplet and a new DNS. It doesn't because a FedWiki instance creates a wiki farm.
My solution was to assign a new subdomain (slate.mcmorgan.org) to the DNS of the droplet at DigitalOcean. This means that both sfw.mcmorgan.org and slate.mcmorgan.org have the same DNS but go the appropriate subdomain by virtue of the name.
The questions are, How many wikis can I run in a single droplet? (A few, at least), and When is it best to start a new droplet?
I'm now thinking of moving my current stuff from journal.mcmorgan.org (in its own droplet) to the same droplet at slate and sfw - three subdomains on the same server - then deleting the journal droplet. What are the losses? Gains? It should be less expensive, but how does it handle the load? Is there much of a load?