I think it's a hub/spoke view of the tags that are on your main page:

blue: for links (the A tag)
red: for tables (TABLE, TR and TD tags)
green: for the DIV tag
violet: for images (the IMG tag)
yellow: for forms (FORM, INPUT, TEXTAREA, SELECT and OPTION tags)
orange: for linebreaks and blockquotes (BR, P, and BLOCKQUOTE tags)
black: the HTML tag, the root node
gray: all other tags

Interesting. Typically you would see this sort of visual representation for entire websites that are connected to one another (e.g., this site would be a dot, mine would be another, google would be one, etc.). Reminds me of my grandmother's kitchen wallpaper in the late 70's.

Yup, I saw the legend on the page that displayed the graph for my site. But I still don't understand. I guess we've found the point at which I stop understanding web stuff.

I did this for my blog too, and got a really cool pattern. I said "hey looky, my blog looks purrty!"
It's beyond nuts that someone sat down and made a program to do something like this. Imagine all the good they can do for the world if they invested that kind of time and thought into something ACTUALLY useful!

Really cool visualization of websites. Does anybody know where to find the source code of this applet?