Wiimote and world coordinates

Couple newbie Wii programming questions:

Is it possible to determine wiimotes movement corresponding to world coordinates? Say, you have the controller in your hand and move it to right, and want to map this in to a 3d movement to right on the screen? Also, what I'm aiming at is not using the ir. In other words the user wouldn't need to point to the screen - although this can be used for calibration, if needed. Would the MotionPlus extension help here?

the wiimote measures force. so just by holding it in your hand you are putting force on it. if you drop it, while it is in the air, there is no force on it. if you hold 1 end higher than the other end, then you are putting more force on the higher end. so, you could take a reading of where it is when the program starts, and then measuring the accelerometer data, you would know where it has moved since the program started without needing IR data. it probable won't be as accurate as you want it, but it should work to a certain extent.