My current mouse, and IntelliMouse optical using Intellipoint 4.1, has worn out after 3 years. The left button has begun giving unpredictable results. A single left click now, more often than not, results in a double-click. So, it has to go. It has been a good egg and is going to be missed. I purchased a wireless IntelliMouse Explorer 2.0 which uses Intellipoint 5.0. I have the old IntelliMouse optical left side button programmed to function as "escape". To my dismay, the left side button of the new mouse does not have the option of being programmed as "escape". Additionally, the wheel will not let me pan when pressed (mbuttonpan set to 1). From what I can gather, most of the new mouses (Is that correct? The plural of mouse is mice in the animal kingdom.) are being made to provide various web browsing functions. The packaging for the new mouse bragged about all the programming options but was not specific as to various functions. I had to pay 50 bucks to discover it wasn't suited for my AutoCAD preferences. Can anyone suggest a new mouse that provides left button "escape" programming and the wheel depression lets one pan in AutoCAD? It doesn't have to be wireless. Thanks