if you attach an object that has an llGetForce() script in it, the force it displays is <0,0,0>. the same goes for llGetTorque().
llGetAccel() works, so does llGetOmega() although the omega gives you some mad crazy vector.
also, llApplyRotationalImpulse does not seem to work on an avatar. if i am standing my avatar leans to the side for the duration, if i am flying, when the call goes off, nothing happens.