Infopirate.org

Volumouse provides you a quick and easy way to control the sound volume on your system - simply by rolling the wheel of your wheel mouse.

It allows you to define a set of rules for determining when the wheel will be used for changing the sound volume.

For example: You can configure Volumouse to use your mouse wheel for volume control when the Alt key is hold down, when the left mouse button is down, when the mouse cursor is over the taskbar, and so on...

http://www.nirsoft.net/utils/volumouse.html 

I'm sure people have experienced this in previous versions of Windows, you talk into your headset microphone and can hear your own voice, drives me crazy. In Windows XP, I was able to go into the sound volume mixer and turn the microphone volume down, which made it possible for silencing my voice from myself yet being able to have others hear me. However I can't find anything within Vista to do such a thing. Does anyone know of any ways in which I can mute myself from myself?