
It gives 'pinch', 'bloat', and 'tap-clicking' behaviors among others to the new mouse, along with alternative function assignments to the various behaviors.

MouseWizard is a very cheap ($2.50) mouse driver that adds a number of options to the Magic Mouse. Despite this, it may work for some people and be fun to check out. It is very much a beta testing project (and should probably be considered in "alpha" development) so while it is a fun experiment, expect it to be buggy. This is a small project aimed to enhance the multitouch experience on Snow Leopard machines, both for the trackpad and Magic Mouse. There are a couple of third-party utilities and drivers available (some currently in development), which will offer more input options and customizations for Apple's multitouch devices.
