Android Bluetooth Gamepad Support - OUYA, GameStick, NVIDIA Shield

There are a bunch of Android bluetooth controllers/game systems either out or soon to be released (OUYA, GameStick, NVIDIA Shield, etc). Although some of them claim to have a Unity Plugin, none of them (except OUYA, I think) seem to address how to detect a controller and read the input.

Are there plans for the built-in Unity Input Manager to handle these gamepads, or does someone need to write a plugin? (which I would gladly buy!)