Being able to draw characters on the trackpad or include other gestures (beyond just tapping) would be useful. See here for examples: jitouch 2 - Multi-Touch Extension for MacBook Multi-Touch Trackpad & Magic Mouse
Being able to draw characters on the trackpad or include other gestures (beyond just tapping) would be useful. See here for examples: jitouch 2 - Multi-Touch Extension for MacBook Multi-Touch Trackpad & Magic Mouse