Arduino + Kinect

We are a group making an installation that involves moving parts and light that change depending on the position of people under it. I was wondering how easy it would be to use a Kinect to map the position of people in the space and send the coordinates to the Arduino. Once I can get the coordinates, the arduino coding will be simple, but I have no idea how to go about getting these numbers from the kinect. Is there any software that can make this easy? Any good tutorials I should check out?
Thanks

I was wondering how easy it would be to use a Kinect to map the position of people in the space

I suspect that if you have to ask, then the answer is going to be "not very".

and send the coordinates to the Arduino.

See above.

Why do you want to use software you seem to know nothing about?