Ok, guys. Start your engines - here's the download and instructions you need to get the leaked Gmail 4.2 up and running on your device. Keep in mind that this is an unreleased version so some things may be buggy or broken, though I haven't run into any problems.
If you somehow don't know what I'm talking about, we have the next, unreleased version of Gmail, and we're finally allowed to share it with you. Gmail 4.2 finally has pinch-to-zoom, a nifty new swipe-to-archive/delete feature, and a bunch of other things. Just for fun I'll embed the video again:
Note: This APK should work on Android 4.0+.