I would like to know if there are other ways to use osx and its applications, besides keyboard and mouse. I know about speech recognition. Recently I found about opera browser gesture-based internet surfing. Maybe there are other programs that use isight in order to take commands from our face expressions. Of course, from hardware side, there is also trackball, tablet surfaces etc These technologies are right here, but I am not sure if somebody here has ever used any of them with success. I would like to read about your related experiences.