Click through the picture to the real page, which shows you an example each visualization when you hover over it in the table.
Interestingly, tag clouds don’t show up in the table? Is this because the authors hate them, or that tag clouds aren’t sufficiently graphical to qualify as a visualization? I know many people who despise tag clouds–and I used to be one of them. But I think they have their place, and I’ll return to the subject some time soon.