Version 0.10 of pix_freenect external for Pure Data/Gem now available.
Sourcecode and binary for OSX and Ubuntu 11.10 available at github: https://github.com/kronihias/pix_freenect
Look at this page if you don’t know how to install a Pd-External.
The pix_freenect external can output rgb and depth simultaneously from multiple Kinect sensors.
- open specific Kinect sensor by serial number – useful for multiple Kinect installations
- output registered depthmap -> rgb and depth image are aligned
- output depthmap directly as 16 bit [mm] values
- resolution of rgb image can be set to 1280×1024
To get audio streams you can use http://github.com/kronihias/freenect_audio.
Real Time Head Pose Estimation from Consumer Depth Cameras by Gabriele Fanelli 
download source and windows/OSX binaries: https://github.com/kronihias/head-pose-estimation
Application that detects head position from a depth image provided by Microsoft Xbox Kinect Sensor in x,y,z and Euler Angles (pitch, yaw, roll) from multiple persons.
–> needs no calibration!!
Application sends data as OSC Message in the format:
/head_pose [User_ID] [x] [y] [z] [pitch] [yaw] [roll]