Kelihos botnet has been taken down. It only controlled 41,000 computers, so capable of sending 3.8 billion spam e-mails per day...not a huge botnet but nice to see another one gone.

http://arstechnica.com/business/news/2011/09/microsoft-botnet-hunters-strike-again-takes-alleged-botnet-domain-hoster-to-court.ars?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+arstechnica%2Findex+%28Ars+Technica+-+Featured+Content%29