Getting Started with Kinect and Processing

http://code.google.com/p/simple-openni/wiki/Installation

http://www.shiffman.net/p5/kinect/

Processing

Download Processing for your platform and install it

Windows Installstion

Install OpenNI,NITE and the Sensor Driver

Download Installation
Package Win64, or Installation Package Win32
Start the OpenNI Installer
Start the NITE Installer
Start the Sensor Installer (Driver for Primesense Devices: Asus Xtion Pro,etc.)
Start the Kinect Installer (Driver for Kinect)

If everything worked out, you should see the camera in your Device Manager(under PrimeSensor : Kinect Camera, Kinect Motor).
Install SimpleOpenNI (Processing < 2.0)

Download SimpleOpenNI
Copy the 'SimpleOpenNI.zip' into this folder:
C:\Users\'your username'\Documents\Processing\libraries

If you don't have this folder then create it.
If you use the 64bit version, verify if you run Processing with 64bit. Mainly you have to install a 64bit
Java version, also you have to remove the Java folder in the Processing folder.