Found out about this today, you can prepend any GitHub username with .keys to fetch their public keys.
http://manpages.ubuntu.com/manpages/trusty/en/man1/ssh-impor... https://launchpad.net/ssh-import-id
> Keybase will be a public directory of publicly auditable public keys.
Nor do I understand why I'd use it. Do lots of people post GPG encrypted messages to each other on gist?