This stats association graph for CIA is starting to show some interesting results. I've had the 'real' CIA server collecting data for a few days now, and I've just started playing around with it using graphviz, python, and sodipodi.
Zoomed-out view of all projects and authors
The big glob in the middle-left is gnome, the one above that is gentoo, below gnome is kde. You can see that (at least in the data from the last couple days) gnome is pretty isolated, whereas kde shares authors with gcc and pld.
A closeup of the same image
Warning, 1.4MB PNG
Just the spiffy kde-elinks-pld-gcc tidbit
Anyway, you can expect soon to have a system for automatically generating graphs like these in the CIA web interface :)