I came across this post on drawlogic.com called AS3 Version of OpenCV for Facial Detection, Web Cam Object Detection, Head Tracking, 3D Library Integration and more with Open Computer Vision Library for Flash. Check out the examples. Using facial recognition to alter the viewpoint and also using it to manipulate a papervision model. There is also a nice round up of what is going on with openCV ports, alchemy and augmented reality.