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 th

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.