Check out the latest multimedia playback headset device from Nikon called the Media Port UP (“UP” read as individual letters).
Incorporating display, headphones, mobile A/V player, Wi-Fi capability, high-capacity memory, and power source in a single compact unit, the Media Port UP is capable of playing up to 120 minutes of uninterrupted video , and up to 270 minutes of uninterrupted music via its 4 gigabyte or 8 gigabyte internal hard drive. It also enables Internet surfing through the WiFi access.
The device is available at 59,800 yen ($580). More information on Nikon.