We are developing a system for wireless capture of gesture, useful, for example, when interacting with a wearable display or other mobile computing environment where a keyboard isn't appropriate. We are putting small RFID-queried passive sensors on the fingertips of a user, interrogated by a reader mounted near a sleeve, for example. This allows the fingers to be free while enabling simple gesture, such as finger curl and touch, to be reliably detected. We are developing hardware to show a working demonstration of this concept, together with a gestural vocabulary appropriate to this interface.