I know about this, but it doesn't answer my question.
Is there a one button wheel mouse? Every wheel mouse that I've seen has 2 buttons.
Why Apple Makes a One Buttoned Mouse
Although I can envision a day where Apple will ship with a two button mouse, they have really, really, really good reasons for sticking to a one button mouse.
The first reason deals with the technical ability of the average computer user... Secondly, Apple wants all developers to follow their interface guidelines... If every application can be expected to work the same way, the learning curve for the user is minimized.