One of the biggest failings of the Mighty Mouse is gone, the stupid scrollball on top that was unclean-able. I was actually hoping from a external trackpad, but I will have to look at this. I use a trackball now and find a mouse hard on the wrist. Now if logitech would combine their trackball with a trackpad, I would be overjoyed.
You might want to try out the Wacom Bamboo multitouch trackpad. Seems to do everything the Apple notebook trackpads do, plus you have the option of using a pen.
Why not? The whole surface is multi-touch, so it would seem like one could program the logic to detect 3 fingers on the mouse and the middle one pressing down.
I think the cool part about this mouse is the bluetooth. Those of us with aging laptops can still enjoy multi touch gestures without buying a whole new laptop.
I use it to open links in new tabs in Safari. The current Mighty Mouse does this -- you just set a scrollball press to "Button 3" in prefs.
I am miffed that the new mouse doesn't have it, as it means opening links in a new tab is now a two-handed operation (you have to use cmd+click on the laptops as well, but you can do that with one hand).
Still, hopefully they'll be able to add new gestures to it via the Preferences pane, so it might make a comeback.
I use it for closing tabs in Firefox when I don't have two hands on the keyboard (W is on the right hand's side of the keyboard for us Dvorak folks).
A middle click anywhere on the entire tab is easier that hitting the lil' x button. Plus, you can turn off the 'close tab' button it the options and make your Firefox look a little bit cleaner.
Cmd+click even works on some things that middle click doesn't, for example middle clicking on the home, back/forward, or top sites buttons in Safari will do nothing at all, but cmd+clicking will properly open your home page, previous page, or top sites page in a new tab.
Alt+Middle-click allows one to resize a window in most X11 window managers without moving the cursor to a window border.
Middle-click also pastes the clipboard in most X11 apps.
Finally, I used to bind middle-click to next weapon in Quake 3 (since I bound the mouse wheel directions to the rocket launcher and rail gun), and zoom in other games.
I'm curious if the shape of the Magic Mouse is better at preventing RSI/carpel tunnel. The old Mighty Mouse didn't do it for me in that regard, the shape and feel in my hand was awful.
