The graph module uses GraphViz to draw graphs. Here are some examples I've put together, but much fancier thinges are possible. See http://www.research.att.com/sw/tools/graphviz/refs.html for GraphViz documentation, and see http://www.research.att.com/sw/tools/graphviz/examples/ for some examples.
TODO: write a bot that adds closing parenthesis as replies to comments that left an open parenthesis dangling (they make me crazy
s/\t/\cK/g # (perl5) Vertical Tabs are so much more interesting