the single button mouse has been a pain. I don't know why apple held onto it for so long. I guess now that pc users are moving to mac more and more and they want their 2-button mouse functions without having to remember any additional key, apple has no choice but to produce a better mouse. Quote from www.apple.com "The Button That Wasn't Alas the fate of the one-button mouse in today's multibutton world. Who has time for intuitive, elegant design when there is so much clicking to do? Thanks to a smooth top shell with touch-sensitive technology beneath, Mighty Mouse allows you to right click without a right button. Capacitive sensors under Mighty Mouse's seamless top shell detect where your fingers are and predict your clicking intentions, so you don't need two buttons -- just two fingers. Click on the left side to use Mighty Mouse in its simplest, single-button form. Click on the right to access contextual menus within applications and edit, copy, label or download from your mouse. It's simple sleight of hand."