Official Vine client makes it to Windows Phone 8.

It's here, the 6 seconds video service from Twitter. The official Vine client for Windows Phone 8 has been released and is available as a free download from the Windows Phone store. Windows Phone users will be able to shoot and post 6 seconds looping videos from their phones to share with their families and friends. Not that they needed the official app to do that. Third party clients of the app were already available  in the Store, the most popular one being 6sec by prolific developer Rudy Huyn. It wouldn't surprise me if 6sec is actually better than the official app. 

Source: Windows Phone Store