I love working with a trackpad. For Lion a mouse simply doesn't fit. However, for some apps (Blender, Color,...) you definitely need a three button mouse. The old Apple ball mouse was a bit awkward but useable - nothing in comparison to my beloved trackpad though.
Short story long, there is a solution to the problem: use an iPhone or iPad as a three button mouse! Remote Mouse is a free app that exactly does that. http://www.remotemouse.net/
You install one part of the app on your Mac, the other on the iPad then start up it up on both devices - voila, you have a wireless three button trackpad.
Works also with Windows (couldn't test that). Android version is coming, Daniel.