If any of you thought about how to effectively use two NRC's in a game, the first thing that probably comes to mind is a boxing game like Super Punch Out!. Indeed that would be a hell of a game, but it is a pretty obvious answer.
What about a Gladiator type game? Where one controller is your sheild, while the others your sword (or maybe another weapon).
The controls could be something like this:
D-Pad on either NRC: controls movement (forward, backward, strafing).
The sword NRC: Moving the camera about like a mouse will control the camera (Or maybe even locked on to an enemy like Z-targeting). Hold the B button and perform a swing to swing your sword. While you are holding B, any action you do will be replicated. If you wanted to stab yourself you could. The A button would perform various simple kicks.
The shield NRC: Held vertically. Move your sheild as you would a real one. You can even swing your sheild as if a weapon.
Other D-Pad: Various functions.
Voila, you have a very intuitive, very realistic Gladiator brawler.