Graphviz is very useful for visualizing large graphs. You can learn to use it effectively in under five minutes. It's also very easy to transform CSV data into graphviz markup by piping it through one or two sed scripts.
The visualizations of processes are crucial to my understanding of Brendan's analysis. As a visual person, I can't imagine using this data another way.
Once again we see that screen size remains a central UI limitation to better UX. Give me a wide printer and a big wall any time!
Looks very nice - I'd love to do something like this for Lua. I went looking for more details, but it looks like your blog is down, alas .. anyway, if there is already something out there on the subject of using Ubigraph, tutorial/howto-wise, I'll go looking for it. It'd be great to have something like that when debugging a large Lua project.