In my scarce spare time, I have written Collabgraph to visualize connections between authors of scientific publications.
This python script reads a (your) bibtex file and draws a graph in which all the nodes are authors and the edges represent that the two authors have collaborated (or at least wrote a paper together).
On the right is the graph created by from the references used in my diploma thesis. You can immediately see what central role Eakins, Meier and Flickner played.
Collabgraph requires only the pygraphviz library, which can installed with “easy_install pygraphviz”.
I am looking forward to your feedback!!!