Wii Balance Board posture assessment program for Mac

I need a simple program to assess posture using a Nintendo Wii Fit Balance Board. The program should plot the patient's center of gravity on a 4 quadrant window over a 10 second period. It should also calculate the percentage of displacement right or left and anterior or posterior in 2 independent values. There is no need for the program to give actual weight. There should be a "start" button and a "reset" button. Someone has already done something similar to what I want on Linux, but without the added features noted above. The code used in linux is on this blog. [login to view URL] Wii Fit Balance board syncs via bluetooth.