I just have the feeling the pregeneration/msterkey/HD-based schemes will never catch on widely even if implemented.
Though if nsecbunker-style separate key storage catches on (even only for power users), that might be a good start to 'deploy' such schemes.
The social network based scheme is rather interesting, but has other challenges.
agreed.
I think we can leverage all these together.
to me the fact that facebook accommodates for social recovery within the paradigm of them actually owning your account, is very telling as to how acceptable it is as a flow and how robust it can be at not getting your account compromised
regardless, I think the pregeneration/HD key would be tremendously valuable as an addition to the alternatives you listed (with which I agree with).
If we were to roll this scheme now, allowing people to migrate pubkeys, I would imagine a vast number of existing users would leverage it (it's kinda OP_VAULT-y in that way)
