Ear Force!
I bought 2 pair of new headphones from Amazon recently. They are Turtle Beach’s model Ear Force X2 headsets.
The primary purpose of these headsets is to connect them to an XBox 360 controller as the microphone source. What happens is the headset’s base station, while connected to the Xbox, transmits the game audio to the stereo headset, and the headset’s microphone connects to the controller to send Live chat sound back to the game. It’s a pretty nifty idea, but not why I bought them.