I'm wondering how the UI/UX for this would be, since basically it's a new address with each new event in the edit chain.

I'm thinking a button would appear ('view latest version' or something) if the client detects that the user isn't viewing the latest version of the post, and a 'view all versions' button in sub-menu, showing all events in the chain.

In terms of seeing such posts in a general feed (or viewing a profile), the client should auto-swap to the latest version (perhaps there'd be a small visual indication to show 'checking for edits') and hide the previous version (which would be visible in the 'view all versions' page.