I really don't believe that anyone, including a person who has never before touched a computer, is going to become consternated when confronted with the alleged intracacies of a 2-button mouse. The stubborn committment to the 1-button mouse is Apple's arrogance, plain and simple. It is rather condescending also, i.e. - "computer users can't possibly figure out the use and functions of two buttons!" The manipulation and use of a pen or pencil is far more involved than the operation of any multi-button mouse, and I am fairly 100% certain that any new computer user knows how to write!
(Not to mention that control-clicking is far more cumbersome than right clicking, and right clicking is more easily intuitive, no doubt about that.)
The real reason that Apple will not be introducing a 2-button mouse any time soon (if ever) is that Apple apps do not take advantage of right clicking, unfortunately. Including a 2-button mouse as a stock item would only highlight a limitation on Apple apps.
I've recently switched to a Logitech Marble Mouse - a 4-button optical trackball that can be had for around $25 (I highly recommend the Marble Mouse). Immediately after plugging it in, I can't believe that I ever got anything done with the Apple Pro Mouse. Why in the world did I stick with that thing for so long? Now I only wish that Final Cut Pro had right clicking features. That would make things even faster.
Oh, and if you are planning to run *nix apps on OS X, a 2-button mouse is an absolute necessity. I use the GIMP as a Photoshop alternative, and I defy anyone to make much use out of this app if you are using the Apple Pro Mouse. Unless, of course, you enjoy performing approximately 100 control-click operations every couple of minutes.
I'll never go back to a one-button mouse either.