This is a very interesting if somewhat technical development: a distributed filesystem strongly tied to an identity system. It looks like it would be a great platform for running TiddlyWiki, if anyone wanted to experiment.
They describe it as "Public, signed directories for everyone in the world”. Basically, it appears to solves the problem of an individual publishing a TW and verifiably asserting that it is theirs.
https://keybase.io/introducing-the-keybase-filesystem
Best wishes
Jeremy.