I don't want to confuse any Mac users out there but for years now there have been mice with two buttons on them. They allow you to do all sorts of things like copy and paste, save images and get properties. All the things you can do with your Apple key but easier. Sometimes people even use a mouse with a wheel on it for scrolling documents and webpages and opening up new tabs in Firefox.

Apple Insider is reporting a rumour that Apple is finally going to release a Apple two button mouse for the Mac.
Quote:

According to sources who have so far filed accurate reports on Apple's future hardware plans, the company is feverishly working on a two-button wireless optical mouse that it intends to release.

Apple enthusiasts have longed for an Apple-branded two-button mouse for over a decade, but their requests have gone unanswered. So what has changed? According to sources, 'it's the company."

With Apple now profiting from low-priced consumer electronics as it makes a push to reclaim market share from Windows, a two-button mouse is 'almost an essential,' sources said.