For multitouch gestures to work you have to assign F3 and F6 keys to whichever action you fancy. I have them set to Expose and Show Desktop. Command+X is assigned to toggle notification center and Dell Support Center is configured to show Launchpad. The touchpad speeds is indeed to high and has been corrected, but I haven't uploaded a changed config yet - not too many changes to roll out a new revision.
actually i found the Dell Support Center keys are broken ? cause when i press it, no LED light while it lights in windows. i will test it with debug voodoo driver.
Dell Support Center are broken, dead in Mac and windows.