Keep those anti-virus programs up to date if you are on Windows machine, as three new variants of Sober have been detected in the wild, being spread primarily, again, by e-email. Though you can't be infected without direct action (such as opening an attachment), most people get infected without knowing it. Though the tactics used by these worms to spread aren't anything new, they still seem to get around at incredible speed. All the most reason to make sure those subscriptions are active.