Here is a video of Stevie covering the Carpenters on the Talkbox on the David Frost Show. Audio rip from youtube below.
Close To You (Snippet) - Stevie Wonder
Since I first saw this, I've wanted the full version. I console myself by thinking that maybe he just stopped after this and said, "So, that's a talkbox and how to use it" and then played a typical rendition of Superstition or something.
Year of The Rabbit, here we come.