“This works for me in 12.10 for speeding up the scrolling.
sudo rmmod hid_magicmouse
sudo modprobe hid_magicmouse scroll-speed=55 scroll-acceleration=1
You can play around with the speed. The min is 0 and the max is 63 (default is 32 I believe). Anything over 50 feels ‘natural’ to me. I used scroll-acceleration of 1; which feels like enough (when you move fast, scrolling is exponential).
If you dont’ type them in right, the mouse will not be able to work until valid settings are applied.”