If you don't need to press both buttons at the same time, you can use simple software to give you a solution for button #2. IMO, it's handier than a physical button (in practise). I just put two fingers down on the pad and click the single mouse button when I want to do RMB click.

The pad also supports tapping, so I'm quite sure you could map the mouse button as #2 and leave the pad tap as #1 if you wanted to (will require 3rd party util).

BTW, a big problem (again, IMO) with their current "Mighty" mouse is that you have to lift your index finger off the mouse before you can use the other button.

I find Apple's track pad and single button a lot faster, more comfortable and way more accurate than any I have used on a Compaq, Toshiba, Dell and IBM.

Bruno