Here's a first cut implementation in ruby. Requires the "hpricot" gem. Outputs a dot file to stdout. http://gist.github.com/35841

Output from the above is at: http://jey.kottalam.net/tmp/obgraph.out

I tried rendering this with "dot -Tcmapx -oob.map -Tgif -oob.gif" but dot segfaulted after 70 minutes. The code as posted at gist only outputs nodes for articles written by Eliezer in an attempt to make the dot file a manageable size. Tips/fixes appreciated.