They could take an approach similar to how Freenet does dynamic things. See here for details: <a href="http:&#x2F;&#x2F;draketo.de&#x2F;light&#x2F;english&#x2F;freenet&#x2F;communication-primitives-2-discovery" rel="nofollow">http:&#x2F;&#x2F;draketo.de&#x2F;light&#x2F;english&#x2F;freenet&#x2F;communication-primit...</a><p>Freenet has a similar immutable datastore but chat, microblogging, etc have been built on it.