Updated on the play store, and available for download[1] as well. Getting it from the play store is the preferred method since you will automatically get updates. Instructions on how to opt in to the alpha available at http://lists.wikimedia.org/pipermail/mobile-l/2014-March/006642.html
* Even more crash fixes! * Displays Main Page when first opened * Handle Special pages properly * Handle missing pages properly * Minor style changes
[1]: https://releases.wikimedia.org/mobile/android/wikipedia/alphas/wikipedia-2.0...