So you've discovered a catchy Vine video that you know your friends will instantly appreciate, but they're scattered across multiple social networks. Will you have to sit there diligently tapping the share button over and over again to make sure everyone sees it? Not after today. Vine has updated its iOS app (Android is coming soon) with a revamped sharing feature that posts those six-second clips on multiple services in one shot. All you have to do to spread the word is mark the social networks you want to include (such as Tumblr, a new addition) and hit the share button. There's still no Instagram option, to no one's surprise, but this could otherwise save you a lot of effort.