How would the implementation of BIP32 (and possibly BIP39) in 2.0 affect the ability to recover old-style wallets?
I'm also very interested in this question. ISTM the best thing to do would be to keep the ability to recognise old wallet seeds and generate old style address blocks indefinitely. Presumably it's just a short python module that can be retained without significantly bloating the code?
pre 2.0 wallet seeds will continue to be supported. They will be recognized by the number of words in the seed:
in version 2.0, the seed phrase will be hashed in order to generate the master public key.
thus, any phrase length will be supported.
However, in order to recognize seeds from version < 2, I plan to check if the number of words is 12.
so it's probably not a good idea to create 24 words seeds now.