But if you have a closer look at them you will regocnize subtile differences and variatios. I love most the perfect bunny mandala in the project The Essence of Rabbit.
We researched with my own students web 2.0 from different point of views. One of them was the visual aspects of it. We found an interesting thing in finnish wikipedia. They had removed the artikel about visual aspects of web2.0 because they belive that there isn´t any identiable visual aspects in web2.0.
If you got some statistics or other data and you want it visualized then you might get some help from Many Eyes. http://services.alphaworks.ibm.com/manyeyes/app