I spent a while looking for this on the web last night and didn't find anything, but discovered a (potential) solution thanks to my G5 at work... My Macally iOptiJr (which is a great mouse), came with supplementary drivers that allow you to set the scroll wheel speed, and what event gets triggered when you click the right button and scroll button, the latter settings on a per-application basis. This is nice, but I wasn't making much use of it, and it prevented me from using the buttons for Exposé, something I've gotten used to at work. So I removed the Macally drivers, rebooted, and then was able to hook up the buttons to Exposé. However, I was stuck with the default scroll wheel speed (read: slow), and no way to adjust it. I scoured the web, but only found tips on how to change the mouse tracking to be faster than System Preferences allows via its UI, for example: Code: defaults write -globalDomain com.apple.mouse.scaling -float 5.0 followed by logging out and back in again. So that's great, but not what I needed. At work today, I remembered that I was looking for a solution, and on a whim looked up defaults: Code: defaults read -globalDomain and discovered this line: Code: "com.apple.scrollwheel.scaling" = 0.5; So... when I go home, I'm going to try setting that value, logging out and back in, and see what happens! Who knows why System Preferences on my home machine doesn't give me the bar to adjust it (I do get the bar on my work machine), but hopefully this will work - and hopefully it will save someone here from wasting money on a shareware utility to do this!