SeisMac - Seismograph on MacBook

I came across this awesome OSX app which fetches the data from the Macbook's inertial sensors and displays the various acceleration components of your laptop in real time. The axes scale can be changed interactively and sample rate varied upto 500 Hz. There are supports available on the site to even calibrate it for accuracy and offset. It might just be a fun app for people but probably its going to be of great use to me in my thesis as it revolves around someting similar :)

Its a freeware available at http://www.suitable.com/tools/seismac.html

PS: I am wondering if it can be used to detect earthquakes or other seismic motions :P
It depends highly on the accuracy and precision of the sensors.