Vine, the six-second video sharing service from Twitter, has undergone its first major upgrade and now offers support for the iPhone's front-facing camera and Twitter mentions in posts and comments. Vine's launch in January was tainted by a major security glitch that resulted in some users being logged into the wrong account. However, after a few patches the issues where sorted out and quickly grew in popularity. While currently limited to iOS devices, an Android version is in the works and is said to include the ability to tag friends to a clip.
