The Edge of Chaos is a site for visualizing complex networks (though the actual entries seems to cover a lot more than just network visualization).

Leonardo Solaas’ Dreamlines is one of the more intriguing visualizations: the user enters a couple of keywords which it uses to pull pictures from Google Image Search. It then creates a slowly morphing visualization based on the images, without ever showing the images explicitly.

A dream about ‘war’

Dreamlines freely associating about ‘war’