The scrolling trackpad is absolutely amazing. It makes navigating with a trackpad tolerable. In fact I wish that I could do the same with a mouse and not use a scroll wheel (scroll wheel agravates my wrist). Use a finger to navigate, simply bring down the next finger to scroll. Brilliant. The only problem I have is that I have to turn off side tracking, because unless you perfectly move up and down, firefox will go back a page if you want to track to the left ever so slightly.