Concerning Apple's Sudden Motion Sensor (SMS) Ted asked: >Might some of you who know their way around this stuff please point >me in the right direction? Ted: You can download some C source code here to see how SMS interacts with IOKit: http://pallit.lhi.is/palli/dashlevel/macbook/motion.zip and here http://members.optusnet.com.au/lbramsay/programs/unimotion_0.3.zip Source references: http://pallit.lhi.is/palli/dashlevel/ http://members.optusnet.com.au/lbramsay/programs/unimotion.html Other references: (This page loads slow. Once loaded, do a find for "sudden motion") http://www.makezine.com/blog/archive/2006/01/ http://www.suitable.com/tools/seismac.html http://www.osxbook.com/book/bonus/chapter10/ams2hid/ http://docs.info.apple.com/article.html?artnum=300724 Ken