the force variables are always -1,0 or 1 - this won't help you out laugh

what you need to do is:
Code:
VECTOR* mouse_speed = {x=0; y=0; z=0;}
VECTOR* mouse_old = {x=0; y=0; z=0;}

...

if(mouse_force.x != 0 || mouse_force.y != 0)
{
    mouse_speed.x = abs(mouse_pos.x - mouse_old.x);
    mouse_speed.y = abs(mouse_pos.y - mouse_old.y);
    vec_set(mouse_old.x, mouse_pos.x);
}


this should give you the distance speed in pixels of the mouse cursor..
i hope i didn't forget something.. written with my iPhone.. untested

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