Forget Facebook fatigue: The new symptom sweeping the Valley is Facebook addiction. A brief outage this morning made most Valley workers more productive — but left some, like strung-out addicts, completely unable to function. One particularly sad case expressed his relief that Facebook was back up. "I've already forgotten the cold panic, the unbearable neediness," he wrote. Also left unable to function: Facebook's PR apparatus, which promised a statement about the outage that has yet to materialize. Perhaps spokeswoman Brandee Barker was hoping to send it out through the Facebook group she normally favors, instead of boring old email, for press releases?