Here is my idea:
At the moment we have to press CTRL+3 to switch to right mouse button, CTRL+2 for middle and CTRL+1 for left. This was a good idea but is too difficult to do with any speed.
My suggestion is this:
As an alternative to the current way, I suggest there should be a second way too:
Touching the screen should only set the cursor position, not simulate a mouse click, that would be done by pressing key 3 for a left click, key 4 for a right click and both 3+4 for middle click. I have seen an option when installing linux distro's like mandrake for a 2 button mouse to be able to simulate the middle button by pressing both left and right together. It should be easy to do this.
Any suggestions / comments?