...the Dirty Dozen since Q1 2009, with Vietnam a new entry this quarter. The top twelve countries responsible for relayingspam across the globe between April and June 2009 are as follows: 1. United States 15.6% 2. Brazil 11.1...
http://www.securitypark.co.uk/security_article263439.html
...becomes part of a botnet and is under complete control of the hacker to use for a variety of purposes that could include relayingSPAM, performing distributed denial-of-service (DDoS) attacks on other computers or committing financial fraud...
http://www.facetime.com/pr/pr060918.aspx