2010 May 24, 6:26
"What You See is What They Get: Protecting users from unwanted use of microphones, cameras, and other sensors," by Jon Howell and Stuart Schechter.
"We introduce the sensor-access widget, a graphical user interface element that resides within an application's display. The widget provides an animated representation of the personal data being
collected by its corresponding sensor, calling attention to the application's attempt to collect the data."
Not sure how well that scales...