(via yahoo news), this amazing device:

A model demonstrates NTT DoCoMo's wearable handset device 'Yubi-Wa' at the CEATEC JAPAN 2005, a technology trade exhibition, in Makuhari, east of Tokyo October 4, 2005. The prototype handset which the company believes is the world's first wearable handset, features a bone conduction transceiver, and is used by inserting a finger with the device into the earhole, the company officials said. The exhibition runs from Tuesday until Saturday and feature around 700 companies in this year. REUTERS/Issei Kato

Why do I blog this? it's a good example of a product (and not a prototype) using a bone conduction transceiver!