Got from http://www.coolest-gadgets.com/
.. no idea if it's already available in town or if it's coming out, someone says it's just a concept ( i wonder how much this rob your wallet!)
"The iRing’s functionality is every bit as cool as the iPod’s. To adjust the volume, you simply need to slide your finger across the touch sensitive surface of the ring. To play or pause songs, just tap the apple icon on the ring and to skip tracks you need only touch on either side of the icon depending on which direction you want to go."
It is USB powered and comes with an equally stylish cradle for you to keep the ring safe or (as I would!) display it proudly on your coffee table. The cradle is also used to recharge the iRing through a USB connection.