Co-founder here. It's fun to see your work on the front page at 6am, and I guess I'll stop lurking now. I'm happy to try to answer any questions you may have.
When will anonymous (guest) accounts be available, and how will they work? Will there be a simple way to promote them to regular user accounts?
As you may know, HN never fails to complain about having to create a new user account to try a service out. Sometimes when you can try a service out before signing up, it's a better experience.
We're hoping Q2 release, and we're dogfooding it now. Our dashboard will soon allow full navigation with a guest account, and we'll use those learnings to deliver a polished product. Guests get a JWT like any other user, but the token is denoted as being a guest, and your application can handle that however you like.
As you may know, HN never fails to complain about having to create a new user account to try a service out. Sometimes when you can try a service out before signing up, it's a better experience.