Historically, Mac users have been incredibly smug about the fact that most viruses infect PCs instead of Macs. Their smugness, if harnessed, could power Boise for a month. But a new strain of Koobface goes after Mac, Windows, and Linux with equal malevolence. Mac folk can still feel a bit superior in that in order to really get completely infected, you have to click OK on a window that says an outside applet is trying to access your computer. But if you do that, your whole computer is essentially handed over to the bad guys. One could argue that if you click OK to something like that you get what you deserve, but there you go.