It would be nice if there was something like this that worked with PGP identities. The public version could just be indexed off the fingerprint. The private version would have to involve signing something, probably just the fingerprint.
Keybase doesn't do this explicitly, but would be in a good position to do so. It's all about identities, including PGP keys. The profile page currently only shows your identities elsewhere, but they do have a "public folder" which could host a bio. They would need to do something similiar to Github profile readmes so that a specific folder or files show up on your profile. They might even have that as a feature and I'm just not aware of it.
UPDATE: They do let you create a homepage with an index.md or index.html. (https://ytjohn.keybase.pub/). However, you would be on your own getting the information from your profile page onto your public webpage. You would just be hosting a static page and not benefiting from the verified identity portion on the profile page.
After zoom acquisition, I ditched keybase and I think a lot of keybase users feel the same way. [0]The original blog post didn't inspire much confidence in the future.
