The US Patent & Trademark Office published a patent application that hints at the future of Apple's Magic Mouse. It describes three new sensors and a triple-axis gyroscope to detect the roll, pitch, and yaw of the mouse. This means that a user could tilt the mouse from side to side to produce a horizontal scroll, a vertical scroll or to tilt a graphic. Additionally, the mouse described in the patent has a convex underside to make all that tilting easier.
You can see the full application and even more images here. Of course, Apple patents many technologies that never see production.
The Magic Mouse became the first multi-touch mouse when it was released last year, replacing the Mighty Mouse and its temperamental scroll wheel. We'll have to wait and see if this even more magical mouse gets produced.