Brian Krebs, columnist of Security Fix in the Washington Post has been following a San Jose company McColo Corp due to it's contribution to spam. Over the last 4 months Brian has been gathering data, which he shared with the service providers of McColo on Monday. Upon reviewing this material, the ISPs shut down service to McColo. I think the results were bigger than Brian expected -- 75% of all spam has been reduced across the Internet -- that is 75% of all spam was coming from this one company. In his column, Brian has some graphs from a couple different sources that displays these terrific results.
Congratulations and well done Brian!