Okay, I've flashed the leaked XXUFMB3 firmware.  Differences
from Jellybean 4.1:   1. Lockscreen Widgets: Yes, they're
present! You can unlock straight to camera!   2. Notification
Drawer: It doesn't look like the fancy 4.2 notification drawer.
The secondary notification menu icon does not give us 4.2-like
quick settings. Instead, it just expands the icons we already
have. Which means that the quick settings icons (Wifi, GPS,
Bluetooth, etc.) do not scroll! Also, the whole thing now has a
blue background. The date and time are differently positioned.
3. Gallery: The title bar when viewing pictures is transparent!
Excellent!   4. Extra Applications: New Message shortcut in the
app drawer, Jewish calender app, OfficeSuite, and Snap n Go.
5. Settings: Here are the new things in settings:     • My
Sound: Under the sound settings, we have My Sound. This used to
be in the Phone settings before.     • Daydream: Yes, we get
Daydream!     • Location Services: We have a new toggle for
Access to my location, and a M