Sources
Thanks goes to Dave Touretzky and Ethan Tira Thompson for helping me port OpenCV to Tekkotsu.
I used the OpenCV demo code for face detection in my program, which can be found here:
http://opencv.willowgarage.com/wiki/FaceDetection
I used the tutorial code here to help me with the face tracking. I used a lot of their code:
http://www.cognotics.com/opencv/servo_2007_series/part_3/index.html
They have an excellent tutorial on face detection and face recognition as well.
I have also done a lot of work with openCV in the robotics club (specifically tracking a puck for the Air Hockey project), so I've had a lot of previous experience that I used in this project.