Mavizen has a nice looking Blueye which act as a middle man to connect your music player and mobile phone via bluetooth. The blueye take the music stream from any music player, let you listen to your music using its headset. At the same time it is also a bluetotoh handsfree if you paired it with your bluetooth mobile phone.

Features

• Take your calls without missing a beat.
• Blueye directly supports any player and headphones that use the 3.5mm plugs
• If somebody calls you whilst listening to your music, Blueye will mute the music and allow you to handle your call using your own headphones and a Bluetooth link with your phone. Once the call is done, your music resumes.
• Personalised Ringtone – Sample an audio stream and turn it into your very own ringtone in real-time.
• Blueye gives the option to use either the internal or a specially extended external mic. Whatever option you choose you get to use your own headphones.
• Firmware Upgradeable

The blueye is available at 60 pound.

via http://www.engadget.com/2006/02/07/blueye-merges-bluetooth-phones-with-audio-players/