I recently saw an article about the Audeo, a product from Ambient Corporation which will enable voiceless communication almost as easily as thinking about it. The Audeo has a wireless sensor that captures neurological activity that the brain sends to the vocal cords, and then digitizes this activity to turn it into speech that sounds very much like the person's actual voice. The product may be available by the end of 2008. For more information, google Audeo and look at the audeo website.