A recent
report I read on AppleInsider suggests that Apple is going
to be introducing a 2-button mouse soon. After years of saying, "Oh
no, two buttons is far too complicated for the average computer
user" (who is somehow supposed to already know that pushing the
Control key while clicking the mouse button does the same thing as
the right mouse button), it appears that Apple is finally realizing
that it will lose sales without a two-button mouse - especially in
the low-end markets it's now entering.
These Windows users are so used to having more than one button
that using an Apple mouse will be a frustration for them.
Control-click really isn't easy for beginning Mac users to figure
out, and even after years of using it, it can still seem a bit
awkward.
I have found that I can live with a single button mouse if I
have to. On my PowerBook, there's only one button for the trackpad.
On my G3, while for some time I had been switching the Logitech
mouse that I shared between that and my PC, I'm now back to using
the original round Apple USB mouse that came with the machine - the
main reason being that I dislike having to reach around the back of
the computer to disconnect the Logitech mouse, then try to bring
the cord up behind my desk so it can connect to the Mac's
keyboard.
I don't mind the Apple mouse, mostly because it takes up very
little room on my desk. Coordinating with the rest of the system
isn't a huge factor, since my CTX monitor is beige and my Apple
Design Speakers (ca 1993) are also beige. I also don't find the
round Apple mouse difficult to use like some people do, but it
could be just because I'm used to it.
If I had a second two-button mouse, I'd switch to it without a
second thought.
People have been complaining that Apple doesn't have a
two-button mouse for years. Many of them end up using the
Apple-supplied mouse anyway. Why? It was provided with the
computer, and perhaps they never had the chance to pick up another
one.
I tend to use whatever comes with the computer instead of
bothering to go out and purchase a new mouse. I figure that if what
comes with the machine is useable, I'd rather spend that money on
something that doesn't come with the machine (a printer or
speakers, for example).
I'll use the provided mouse - unless the computer doesn't come
with a mouse. This might be exactly what Apple's aiming to do in
the near future. They've already started it with the Mac mini, this
time saying that users can use their existing PC keyboard and mouse
with the new Mac. Perhaps, though, they'll end up doing something
like this for the iMac and PowerMac G5?
It's more probable that if they get this far offering several
different keyboards and mice as an option in addition to the
provided ones, eventually they'll stop including them and give you
the choice when you purchase the Mac.
The base iMac, for example, would not include a keyboard and
mouse (yet another way to lower the sticker price of the machine).
If you don't already have a keyboard and mouse that you can use,
you would have the option to add whichever variety of Apple's (or
another manufacturer's) at an additional cost.
The number of options available to Mac users is increasing and
will only increase again if Apple decides to introduce a two-button
mouse. There are a number of wireless keyboards and mice (from
Logitech, Macally, Apple, and others), and many, many corded
keyboards and mice that work with the Mac.
However, there are very few that coordinate design-wise with
current Mac models. Apple's two-button mouse will fill the hole
faced by those who want an all-Apple system and also want more than
one button on their mouse.
And it would be nice if that two-button mouse also has a
scrollwheel. 
