Web pages as graphs

I just saw this on Digg: A Processing applet that graphs out a visual representation of the structure of web pages. So I ran it on some of mine:

Let's start with this site. It would be interesting to compare it to other WordPress sites.

Here's OSFlash:

And the London MMUG (ooh, those tables are showing in the VBulletin engine):

And, finally, Ariaware: