Another new product announcements from Apple today is the Magic Trackpad, this is basically a supersized multi-touchpad. This wireless input device is powered by two AA batteries and communicates with your Mac via Bluetooth. Only Mac OS X Snow Leopard 10.6.4 or later is supported, Windows users are out of luck. You can get the Magic Trackpad at Apple's store for a whopping $69.
Desktop users, your time has come. The new Magic Trackpad is the first Multi-Touch trackpad designed to work with your Mac desktop computer. It uses the same Multi-Touch technology you love on the MacBook Pro. And it supports a full set of gestures, giving you a whole new way to control and interact with what’s on your screen. Swiping through pages online feels just like flipping through pages in a book or magazine. And inertial scrolling makes moving up and down a page more natural than ever. Magic Trackpad connects to your Mac via Bluetooth wireless technology. Use it in place of a mouse or in conjunction with one on any Mac computer — even a notebook.