I thought this was cool.
When using the trackpad, place 1 finger on the trackpad and "scroll" with another finger. Or better yet, place 2 fingers on the trackpad and use a third to "right-click."
I was messing around at the Apple Store today and it is very easy to do.
Anyone know how to get Front Row to appear without using the remote? There is some key combo I can't remember. The first to post gets a cool smilie.