Vine is a hugely popular social network that lets users share short videos with one another. Combined with its tight integration with its parent company, Twitter, Vine has introduced a whole new brand of entertainment to the online mix. So, how do you get it on BlackBerry? Easy - through the Amazon Appstore.
Go to the Amazon Appstore download page in your BlackBerry browser (http://www.amazon.com/getappstore). Tap the "Download the Amazon Appstore" button. The Downloads window should pop up asking you where you want to save it and what the filename should be; just tap Save in the top-right, then tap the file when it's done downloading. If the download window isn't there, tap the overflow menu button in the bottom-right (three little dots), and tap Downloads.
After installation, open the Amazon Appstore, enter your Amazon e-mail and password, and tap the "Sign in with my Amazon account" button. If you don't have an Amazon account, tap the "Create account" button and follow the steps.
Tap the magnifying glass in the top-right of the Amazon Appstore, and type Vine into the search box. It should pop up in the results below; just tap the Install button to get downloading. You'll have to tap another Install button after that, and confirm app permissions to complete installation.
Tap the Vine icon in your home screens to open it. Log in with your Twitter credentials, and you're good to go!
Keep in mind that I haven't been able to use the camera to actually record Vines on the Z30, and general performance may be choppier than you'd like, but it's still passable.