I notice there is 7200rpm 80GB HD option with zero gravity sensor for Gateway Tablet both C-120X and C-140X small business version. I didn't have that option when I purchase S-7125C (the small business version of C-120X) a couple months ago. Does anyone have any idea what is it? My wild guess would be a shock sensor just like the Fujitsu's tablet and Lenovo's tablet. If that is true, I hope it can be added to our existing tablet.