Facebook stalking too time-consuming for you? Now there’s an app for that. Facebook Breakup Notifier lets users pick friends whose relationship statuses they’d like to stay up to date with and sends them an email when it changes. "You like someone. They're in a relationship. Be the first to know when they're out of it," reads the app’s website. "Sure, it's a little creepy but I imagine that it will be hugely popular," says Martin Bryant of the tech blog TheNextWeb. And “if you're worried about being stalked maybe you should be more careful about who you approve as a Facebook friend?"