Research Articles:
1. Lieberman, E.,  Hauert, C., and Nowak, M (2005). Evolutionary Dynamics on Graphs. Nature, 433.
2. Ohtsuki, H., Hauert, C., Lieberman, E., and Nowak, M (2006). A Simple Rule for the Evolution of Cooperation on Graphs. Nature, 441.  

These papers are a good place to start if you're interested in evolutionary graph theory. Many beautiful graphs and structures arise, some of which you see pictured on these pages. There's a particularly readable chapter about evolutionary graph theory in Prof. Nowak's book, Evolutionary Dynamics, which gets a really warm reception in:

Nee, S. Beautiful Models. Nature, 2 November 2006.

If you're really motivated, there's also a discussion in:

Roger Guimerà and Marta Sales-Pardo (2006). Form follows function: the architecture of complex networks. Molecular Systems Biology, 2:42.

What I cannot create, I do not understand.