If you're building or managing a botnet of more than a few thousand victim machines, where and how you host your command and control (CnC) servers is damned important.
Where were the bad guys hosting there CnC servers for the first half of the year? Damballa has just released a blog covering the top-10 worst offender service providers as well as a breakdown by country. Guess who's at the top of the lists...
Botnet Hosting (H1 2010) Blog