According to boing boing (and all these photos) the ear was grown in a lab using his own cells and an ear-shaped mold. A similar technique was demonstrated back in 1997 when cow cells were used to grow an ear on the back of a mouse.

Ultimately Stelios hopes to implant a wireless microphone in his third ear so we can all have a listen. My question is, how unusual will this be considered 10 years from now?