The fusion is using "ultrasonic technology" for positin checking of their remote. It is yet in development stage.
Quote:

Fusion is expected to launch at the end of next year so expect a hands-on test nearer its release.



As you can see from the IGN report, it is still far from release. By that time WiiMote will be very easily available to everybody.

Though I havent signed any NDA but the current product doesn't have any buttons.

My Specialities Limited.