Intego claims that Snow Leopard includes some form of Anti-Virus / Anti-Malware software. Joshua Long speculates regarding what engine the software might use. Mac4Ever also has a post regarding this. http://translate.google.com/transla...s/47028/snow_leopard_un_anti_spyware_integre/ I'm mildly skeptical as both screenshots reference the same trojan, but the multiple languages and post by Intego do lend some credence. If true, it's surprising that this hasn't been leaked prior.