Stephen VanDyke has an excellent infographic up on his site showing how news travels on the Internet. It's excellent, showing clearly path, and level of importance, and relationship. And since he doesn't have any real statstical data to represent, it would be hard to improve upon this.
Now if he DID have access to statistical data, I'd like to see maybe a time measurement. I'd also like some different color coding (the green and the orange are similiar - at least to my color-blind self).
But I like it. It's a very clear graph that I "got" at a glance. Which is how it should be.