WiPod
Why no one has made this joke yet, I don't know, but wireless music streaming over devices has had a patent filed on the topic by Apple, although that may be just a preemptory move to ensure that they don't see competitors come to market or patent such devices first. There are already music players that use wireless networking, so a careful examination of the patent would be needed to understand why this is unique compared to those pre-existing devices. Or whether the patent predates those devices.
The patent's abstract seems to be talking more about something like device-to-device AirTunes, so you could stream from one WiPod to another, or from a WiPod to a computer or other devices.