I just got my MAXX a couple weeks ago. Apologies if this was posted closer to the time when it was originally released.
Tap Apps>Settings>About Phone
Repeatedly tap Android Version
It's nothing special, just a picture of an zombie gingerbread with some other zombies and I think the Android character behind it.
I was looking at a video of ICS (for the Prime tablet) when I discovered this, figured it might work in 2.3.6 as well. Obviously the egg is different in ICS.