I'm thoroughly entertained by the referral and exit pages I see on the tracker for this blog. I always wonder about the route readers took to get here or where they'll go when they move on.
A team of scientists have thought about this on a much larger scale: what can we learn from blogs about human behavior? There's a fascinating article in The Chronicle about work being done at a few universities. Some are literally trying to map the blogsphere.
Make sure to follow the link on the right hand side of that page...it's pretty interesting!