The idea of using JSON in a very informal, global messaging system is a really strong one. Messaging is huge these days but pub/sub systems still aren't as commoditized as they should be.
However, Telehash's reliance on UDP means we'll still be worrying about whether or not our message made it. Its' confusing lexicon (telex? dial? listen?) is unnecessary for simple cases.
Telehash should be simpler and closer to HTTP.
tldr: we spend too much time writing pub/sub systems that talk JSON, but this is too much to learn.