A t the Consumer Electronics show in Las Vegas, Sony unveiled its latest Walkman MP3 players. They include the W-series Walkman MP3 player NWZ-W202, featuring a cord-free, wearable design, and the X-series Walkman Video MP3 player (Sony NWZ-X1000) models that not only support Wi-Fi technology - but for the first time - features both an Organic Light Emitting Diode (OLED) touch screen and digital noise cancellation capability