Kurzweil has been selling devices that do what you're suggesting for several years. Here's one from 2006: http://www.youtube.com/watch?v=TOwDzDnd9NY http://ww

Kurzweil has been selling devices that do what you're suggesting for several years. Here's one from 2006: http://www.youtube.com/watch?v=TOwDzDnd9NY http://www.youtube.com/watch?v=TOwDzDnd9NY Here's a modern version on a cheap cell phone: http://www.youtube.com/watch?v=iKCLjC5chuM http://www.youtube.com/watch?v=iKCLjC5chuM