I remember reading a news story about this exact type of thing a few years ago. I can't find the article but it might have been about LeafView: http://www1.c

I remember reading a news story about this exact type of thing a few years ago. I can't find the article but it might have been about LeafView: http://www1.cs.columbia.edu/graphics/projects/efg/uist06-abstract-final.pdf http://www1.cs.columbia.edu/graphics/projects/efg/uist06-abs... http://www.cs.columbia.edu/graphics/publications/white-marino-feinerCHI07.pdf http://www.cs.columbia.edu/graphics/publications/white-marin...