Okay, custom domains are discoverable and have all endpoints in place. Now just need to let everyone choose their handle. This will go in a new "Federation" section on the blog settings page -- a page that's starting to get a little long I think, so I'll have to redesign it a bit in the near future.
Actually it'll be something like this in the "Publicity" section for everyone, with a textbox that appears when "Custom domain" is selected.
Something I'm looking forward to: non-technical users seeing this new setting on their blog and asking me what it means. I have no doubt it'll be confusing to the uninitiated, so it'll be nice to hear everyone's questions, and figure out how to explain federation in a way that makes sense to them.
Based on that, I can tweak the UI so more people understand what's going on right away. Enough of that, and more people will be able to join the fediverse without the whole learning curve.
I love that you're thinking about non-technical users and how to help them understand. I find that a lot of #FOSS projects take a "if they don't understand all of the technology I'm creating then they should get smarter and figure it all out." Terrible communication / usability / marketing.
