I went to the Apple store to try out the mouse. I'm underwhelmed. It's better than the absurdity of a one button mouse with no scroll wheel. I think Apple's elegent design is very appealing but at some point function is most important. I'll stick with my zillion buttoned Logitech/MS mice. How can one live without forward/back buttons on a mouse?
If you really like the regular Apple mouse but just wish it had a right button and scroll then you'll like the Mighty Mouse ("here to save the day!"). I think their intentions are misguided but I give Apple credit for creating a multi-button mouse that can behave exactly like a single button mouse if you so choose.