Storm Worm Botnet Attacks Anti-Spam Firms

"It's been a pretty constant battle to stay online," Vincent Hanna, an investigator for the non-profit Spamhaus Project, told InformationWeek. "It's an arms race. They try something. We block it. They try something else. We block it. It goes on and on. Sometimes it's fine and sometimes we spend hours a day on this." Link.