I sometimes use a magic mouse on my 13" MBA. I find the tracking speed is still not fast enough on the Air. I have to move my hand too far to get the cursor complely across the small screen. I came across this little bit of software and wondered how well it works: http://bettertouchtool.en.softonic.com/mac I've read in forums where the software crashes or locks up Snow Leopard OS. Others love it. Thoughts?