You didn't think the crafty Google developers would make a new OS version and not include a new easter egg did you? The folks over at AndroidPolice posted a fun little video demo of the new Android 4.1/Jelly Bean easter egg. Here's a quote from them sharing how to get the easter egg to emerge and describing the results:
Post in the thread if you guys find any other cool Jelly Bean easter eggs as you are playing around with the .sdk or the ROMs we shared earlier.Indeed, the egg first presents itself as a smiling red jelly bean complete with antennae when the user repeatedly taps the Android software version in settings (this can be seen on the left). In the background is whichever picture you've chosen as your wallpaper. Then, if you long-press anywhere on the screen, countless smaller jelly beans will emerge (seen on the right). What's more, you'll also be able to flick these smaller jelly beans off the screen should your spirit so desire.
Source: NexusTablets.net via AndroidPolice