This application isn't exactly new, but I just found it, so I figgured I'd post. It's basically a program that takes advantage of operations that are built into the trackpad for powerbooks, but which you can't normally access. This means that, using it, you can tap to click or right click, use the edges to scroll, and use the corners of the trackpad for other types of clicks. you can also set different types of acceleration for the trackpad, so that the curser moves a bit differently, in case you don't like how apple has it set up.
Sidetrack
Sidetrack
