will be looking into this soon. not for the bounty, but for cross chain bank transactions.
Although unfortunately initially we will only have the two blockchains to demonstrate our ACCT AT but what you will find is that we will have created a way to do trustless exchanges across those two blockchains with no need for a separate application (i.e. the trading will be able to be done within the two wallets of those blockchains).
This will set it apart from projects like Mercury that rely upon a centralised website to organise the trades.