As an iPad/iPhone user, I actually laughed about the "natural" scrolling idea on my Mac when I first heard it. It just seemed stupid, unintuitive, and unnecessary. After installing Lion, it felt out of place and I consistently found myself scrolling in the wrong direction. But now...I've got to say...I've not only gotten used to it, but I love it. In reality, it does seem more natural and (oddly enough) brings the Mac closer to an interactive experience like on the iPad.