Another thing - I'm not sure that such services would be really effective. People who find their account hacked usually use link that they got to email to lock account or ask moderators to lock account. Hacker can't do anything with locked account, so he can't return account to original owner after getting ransom. Only theymos or Cyrus can recover locked account.
Global Moderator hilariousandco can unlock accounts too (he just can't unban them). It could still work if the account credentials are transfered, but it's one more hoop to jump through.
I still hope that one day theymos will release automated account recovery system and such services that you're offering wont be needed.
The last thing I read about it was "before the end of this year", but that wasn't an official announcement.