His name is Kevan Atteberry, at left in the shot below, and as you'll see he has mixed feelings about his achievement. Pride at having created such a familiar bit of iconography (and having done so on his Mac); chagrin at how his brainchild is viewed.
See web-only content:
http://www.theatlantic.com/technology/archive/2011/05/it-looks-like-you-are-giving-a-keynote/238532/
This article available online at:
http://www.theatlantic.com/technology/archive/2011/05/it-looks-like-you-are-giving-a-keynote/238532/