An exemple of a blog map made by Ben Fry.

"The first, used for an article titled Linkology, shows the connections between the top 50 blogs, based on data provided by Technorati. The colors depict the categorization: orange for technology, blue for politics, pink for gossip, and green for "other".
The intensity of the line is based on the direction of the link, so the lines are brightest at the link destinations. Because lower-ranked blogs are more likely to link to a higher ranked blog than vice-versa, the lefthand side of the image (the top ranked blogs) is brightest."

If you see any deficiences in links or information, please let us know in a comment.