The problem is that most of the people posting here aren't bright enough to realize that no one mouse works for everyone. Apple's mouse doesn't, Microsoft's mouse doesn't. Logitech's mouse doesn't.
Apple offers a mouse that is different. If you haven't tried it, you have no business commenting. If you've tried it and don't like it, no big deal - it won't appeal to everyone.
People who think Macs don't support two buttons are obviously not interested in reality - they have their own Mac-bashing world and can't be bothered with facts. If you wanted multiple menus, you could use almost any generic 2 (or more) button mouse on Macs for at least 10 years (I did). Or, you could use any Apple mouse made in the last 5 years or more (the Mighty Mouse is actually a 4 button mouse).
Personally, I like Apple mice, but that's largely because I use them the way they're meant to be used. For example, the 'hockey puck' mouse was widely criticized by people who thought the only way to hold a mouse was to grab it with your entire fist and hold on for dear life. People who were willing to adapt and use it with their fingertips often loved the mouse.
Similarly, I love my mighty mouse. As long as you don't grab it and hold on for dear life, it works well - at least for me. People who are so anti-Apple that they won't even give it a try will, of course, be disappointed.
I haven't tried the Magic Mouse so I can't comment. I'll probably buy one to try it because the concept sounds good - I like the CONCEPT OF the ability to do more things with the mouse, but won't know if it works well until I've tried it. So those of you who haven't tried it (which is probably 99% of the posters) should just shut up.