Using a terminal, edit the .GlobalPreferences.plist file in your ~/Library/Preferences directory. If you're using Pico, for example, type:
pico ~/Library/Preference/.GlobalPreference.plistOnce the editor opens, use control-W to search for "scaling". You'll see a couple lines that look like:
[key]com.apple.mouse.scaling[/key]Note that I've used square brackets instead of angle brackets, due to parsing issues with HTML. Change the number in the "[real]" line to a higher value. 1.7 is the maximum you get through the control panel; I'm using 3.2 now and like it on my 1600x1200 screen. Values over 10 may not work; I tried "15" and it became "1.5". Save your changes (control-O in Pico) and then quit the editor (control-X).
[real]1.700000000000000e+00[/real]
I'd actually tried this months ago, but the mouse didn't seem to change speeds at all. As the thread points out, the key to making it take effect is to simply (argh!) logout and login again. You should now have a turbocharged mouse. Note that if you use the Mouse preferences panel and change the speed slider at all, you'll (obviously) lose your hand-edited value and have to repeat this process to speed up your mouse.

