Thanks for sharing. I was discussing trackerless p2p social network with offline publishing and syncing when close to a friend a few months ago, I'm amazed how Scuttlebutt seems to be exactly that.

I was thinking of using high frequency sounds (inaudible) for peer discovery when in the same room, like chromecast is doing when phone and chromecast are not on the same local network, but simply scanning network seems to work just as well, apparently.