On the list, but way at the end of the queue.



Being able to sign while not connected to the web is already implemented, and sending a signed transaction through some other channel (NFC or Bluetooth) is being considered. If you mean something like Armory style completely offline signing, that's not on the list. We hope that a new tech we are looking for will make that unnecessary.



Not possible. At least not with one tap. You need 1 tap to request the address and amount to send to, then the wallet signs, and then one more tap to send the signed transaction. The reason 1 Tap = 1 Pay works with credit cards is because it's the equivalent of tapping to give the merchant your private key, and then having them only pull out what they need.