hey @matt I'm keen on that sameAs suggestion we talked about at art hack the other night:

        @super_key
        /      \
@mixmix       @mix_windows

TL;DR

• you share an identity by minting a new keypair (@super_key) and share it between your devices
• @super_key is only ever used for reading
  • someone sending a PM to 'mix' sends to @super_key and any of my identites can read
  • when I reply, I sign with the key from the chain but 'write' as only one of my identities
• sameAs is established by users posting message signed with the @super_key private key
  • if this is done as a sameAs thread with people replying to update the status (e.g. "I'm also sameAs", or "this sameAs is tombstoned"), then then we could treat that as a 'document' which is easy to index / lookup for the purposes of checking relationships.