TEN Technologies is now shipping its naviPlay Stereo Headset, Bluetooth-equipped wireless headphones that can easily switch between music and phone calls. Created specifically for iPod, these cans work with all iPod models and also include a built-in microphone. Plug the naviPlay Bluetooth iPod adapter into your music player, and its line-level analog signal is transmitted to the headphones without any software installation required. Synch it up with your Bluetooth cellphone and you're good to go. Available now for $200.