There are quite a few reports currently about particularly ugly development son the fake AV front. The Register’s John Leyden has referred to a "double dipping" attack, in which the notorious Antivirus 2009 is implicated in an attack that goes beyond offering useless rogue anti-malware to inflicting actual damage on user data files, in order to force the victim

[Updated after further investigation.] For the past few days, I’ve been seeing spam to one of my accounts offering me various bits of software. Nothing unusual about that, of course, but this one was better constructed than usual, and consistent, and I made a mental note to look more closely when I’m a little less