Hello Synpainter:
I too use a Wacom tablet,  but primarily for Photoshop work.  A Shuttle Pro is used for video editing (Final Cut Studio) and the 3D mouse for character creation and animation.  As for the 3D mouse, when it works, it's a great time-saver.

With respect to the "percentage of Mac users" responder, my gut feeling is that the 5% quoted number seems a bit on the light side but as the last poster suggested,  real numbers would be helpful.