I'm about to purchase the new Al 15" PB, and I went to check it out at an Apple authorized store in Tokyo. (yes in Japan). I tried typing on keyboard on the 12", 15", and the 17" PBs using MS Word, and I found a problem on the 15". Whenever I typed for a few seconds, my right palm (near the base of my thumb) would touch the trackpad and move the curser to a different part of the screen, making it extreme difficult, if not impossible to type up a document longer than 3 words. I turned off the ability to click using the trackpad in the control panel, which solved the problem, but the 12" and the 17" PBs didn't have this problem even when this setting was turned off. Has anyone experienced this problem? This will be my first PowerBook since the PowerBook 180c that I bought 10 years ago for $4500 which was with the academic discount. (with 8mb of RAM)! In any case, thanks for your advice.