Apple's already patched the Java vulnerability that turned an estimated 600,000 Mac OS X computers into unwitting participants in a botnet scheme, but what of those infected PCs? According to Apple's support pages, the company is developing a tool that will remove the Flashback trojan from existing machines, and it's also cooperating with internet service providers around the globe to disable the command and control network that tells Flashback what to do with its victims. While the company doesn't provide any release date for the software, it seems Apple has already begun requesting that ISPs shut down suspicious domains — including, not so amusingly, the domain for Doctor Web, the Russian security firm that discovered just how widespread Flashback's reach might be.