Top one is worth $150 million.  The 25th one is less than $1 million.  This is still, I think, new territory….

24/7 Wall St.: The Twenty-Five Most Valuable Blogs

We looked at unique visitor and page view measurement services when possible: Alexa, Compete, and Quantcast. These services are often criticized for estimating website traffic too low. We have tried to take that into account. We also looked at data at blogs which gave their own ad rates and page views. Our estimated page CPMs are based on quality of ads and number of ads on each page. We looked at margins based on headcount and our opinion of how may of the people are full-time. Current growth rate based on our measurement sources was also taken into account. A site with traffic doubling year-over-year was give a higher multiple than one with flat traffic.