Since I like talking about deities, I'm wondering other things now.

(kick me if I start asking too many questions, Gary) LOL
So how did you get the idea that D&D should be a game of pantheonistic religion? It is rare to encounter monotheistic or even dualistic religions in D&D campaign settings and most home campaign DMs I have played with use pantheons as well, either mythological, adapted ones, or their own creations.
Also, did the Greyhawk deities have any mythological origins or did you create them using nothing more than your imagination and your subconscious?
Thanks!