Below is a visualization of an email discussion thread that started March 22, 2012 with the subject; Change Proposal for HttpRange-14. Nodes are colored to represent the author of the email, and when clicked will bring up the email in a separate window. The larger blue node represents the email from Jeni Tennison that started the thread. This detailed view was selected out of a larger view of all emails on the topic of httpRange-14, to provide some additional detail.
If you want to see the data behind the graph checkout the RDF that was extracted from the public-lod mbox files.