Apple Patents Hint At Geek Sign Language Future
They also claim to be able to distinguish between various combinations of fingers, including adjacent and non-adjacent finger presses. In particular, they point out that the pinky finger when applied sideways to the trackpad (as in the bottom of a fist) generates a unique pattern and could be used for its own customizable functionality: such as adjusting volume or putting the computer to sleep.
I hope if you sneeze while using the touch commands you don't wipe your hard drive clean.