Here's a few other beautiful venn diagrams, including the first simple symmetric 11 curve diagram: http://webhome.cs.uvic.ca/~ruskey/Publications/Venn11/Venn11...

That being said, this is the coolest venn diagram visualization diagram I've seen. Someone should make an interactive 11 curve diagram.

Edit: http://www.combinatorics.org/files/Surveys/ds5/VennEJC.html has a lot more info on venn diagrams in general, if anyone is interested.