Texone.org has a fun Processing applet that takes a URL and converts the site, including links and content, into a tree, with external links creating other trees ... that look like web broccoli ;-)

The trunks reflect a unique color for each domain, and the branches (I believe) represent pages, and leaves are individual bits of tags or content.  The image above is the output of this site -- which looks like a few stalks of black broccoli with a touch of blue ink. Via Gravity Monkey