I did. It sounds hacky and i doubt many people would do it. Sorry if I offend you saying this.
It's not as hacky as it sounds like.
It doesn't require a jailbreak.
The iOS wallet app could also been made open source so people can check what's going on.
Sorry to say that, but in future, nobody will use web-wallets (or similar) where the user doesn't own the private key.
What have we learned from Mt.Gox?
The one who don't own the private key they don't own the bitcoins signed with them!
In my eye, only a nativ iOS wallet will have success.
Would you trust your money to a startup company?
I wouldn't.