God, player #1, is a very special Wizard, and a very useful tool. God can do some things that no other Wizard can, and some commands function differently for God. Because of these powers, it's wise to safegaurd God's password at least as well as you would the MUSH account's password. While the same can be said about any Wizard password, it goes doubly for God.
Making wizards
God is the only thing in the game which can set a WIZARD bit on a player. When you recruit Wizards for your MUSH, you'll have to log in as God to grant them the bit. For that matter, only God can remove a wizard bit or @nuke a wizard player, a definite safety feature.
Malloc stats
If you have MEM_CHECK defined, running @stat/table as God will give you a dump of memory allocation information internal to the game. This can be useful in debugging memory leaks and the like.
@startup for @functions
When the MUSH starts up, the @startup attribs on all objects are triggered, in ascending order of db#. This means that God's @startup is the first one triggered, which makes it ideal for doing @function commands, since later @startup's may rely on your @functions being installed.
Note that if you do your @function calls in a @dolist, they will get queued after all the other @startups run, so you probably want to spell them out explicitly if timing is important to you.
Miscellany