Aaron takes an in-depth look at Jelly Bean (Android 4.1) on the T-Mobile Samsung Galaxy S III.  New features include a revamped notifications bar, Blocking mode, Home screen mode, and a few other cosmetic changes.  Project Butter is in Android 4.1, though testing found the overall speeds to be on par with the Ice Cream Sandwich/TouchWiz combo that the phone sported prior to the upgrade.  The update is available now for Sprint and T-Mobile customers.