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.
The faster you climb an escalator, the more steps it takes to get to the top.
The solstice is upon us!
Common big data definition: "Amounts of data managable by Postgres, but not by the hip database that Hacker News convinced me of in 2011."