An anonymous reader asks: "I'm seriously considering buying a PowerBook. The design is gorgeous and OS X will give me a Unix-based operating system without having to sacrifice main-stream comercial applications. What's holding me back? The trackpad. I'm a fan of the ThinkPad-style joystick, but my Dell laptop came with touchpad drivers that provide useful features like the ability to scroll by sliding your finger along the edge of the pad. That was enough to make me switch to the touchpad on the Dell, but, I can't find anything similar for the PowerBook. I found references to Overdrive, but it appears to only work with USB devices. Are there any other drivers out there that add more functionality to the trackpad? If not, is that because no one has done it yet, or is it because the APIs do not exist to do such a thing? Thanks."