If you've used OSX you've probably figured out you don't need more than one mouse button, and other mice don't really function with more than 2, all those extra buttons are just basically hotkeys that do what your keyboard does and most people usually end up using them for ctrl, alt, tab, shift, etc etc...
So on windows you don't need more than 2, mac you don't need more than one, and all the other buttons are just for whatever else you use to generally keep your other hand off the keyboard as much.
But no scroll wheel? Talk about a productivity killer, having to stop what your doing to go to the scroll bar to reposition or see more makes everything go slower, and using it annoying. Windows users are so accustomed to using the mouse wheel the scroll bar generally works just as a visual referrence as to what your current position is out of how much content.
But thats just the way these things ship. How many of you use the crappy mouse came with your dell, hp, compaq, gateway, sony or whatever. Many people replace them immediatly with a mouse that works better and has more features. The same is true with mac and pc, the standard mouse often gets replaced by one that suits the individual better, which means all these logitec 8 button rechargeable nimh laser shooting can opening mice we all love, are used on both mac and pc and work no differently.
Mac isn't becoming able to use more than one mouse button, or able to use a scroll wheel. You've been able to use them pretty much just as long as you have on a pc. PC's just generally ship with a mouse that has them on there as a standard. And the "standard" mouse that comes with a mac is simply getting an extra button that it doesn't need, just to help pc users who couldn't adjust to using an operating system with a mouse that doesn't need more than one button any better than those people that can't seem to figure a reason to replace their vcr with a dvd player.
If apple really wanted people to use the mice they make, they'd put a scroll wheel on it, that ipod-like touch sensitive idea sounds awesome.
