You know that IM worm I mentioned last week? An 18- and a 21-year-old were arrested for its dissemination. The teenager, Farid Essebar, was arrested in Morocco and Atilla Ekici was picked up in Turkey, the BBC reports. “They are believed to be responsible for the Zotob worm” that exploited a flaw in Windows 2000 computers, according to the BBC, which added that “more than 100 firms were affected, including CNN and the New York Times.” Notable was the speed of the arrests halfway around the world – less than two weeks – which might suggest growing computer-security cooperation between tech companies and law enforcement. CNET has further details.