I am using Ubuntu 12.04 on my MacBook Air (13" mid 2011) and it works lovely! Are there any news or possibilites to use multi-touch gestures?
But to now I am using the system out of the box. One and two finger gestures are working.
Ubuntu supports a range of multi touch moves out of the box. Although ive noticed that some
of the don't work in unity2d, so i recomend staying with unity.
Touching the pad with four fingers : will pop up the search field sliding over a window with three fingers: move that window spread three fingers over a window : maximize window the opposite will minimize the window.