Unfortunately there doesn't seem to be any way to set the recovery account. It's locked to anonsteem and I would happily set people to @steem as the recovery if they chose to, but honestly the recovery would be useless because the point being that steemit wouldn't have their email or any way to verify.
In the current state, I will refuse to recover any account, unless the account was provably lost by my system (e.g. the password/keys generated didn't match the account). The point being, this is for "anonymous accounts", and thus I don't, or shouldn't know who created it, or have any way to prove who created it.
This is highly appreciated service. I think the service might be helpful to many users who are facing difficulties.
A message signed from the bitcoin or litecoin address would make a good verification actually.
Good point. I think there might be other ways to verify this too. I'm not sure how Steemit Inc would want to deal with these issues though.