This is from a family called
Blogpulse companies made
2004 BLOG Trend Report. They claim that the most advanced machine learning technology and natural language processing mechanisms move to track and analyze blog's trends. I don't know if it is true, but their report is more comprehensive and refreshing, here, "Quote" is the basic judgment criteria, and the various topics of the BLogger in 2004 were in the eye. If there is time, read the related links, it will benefit too much, and below is a gmail vs. Yahoo! vs. Hotmail statistical report: