What is the origin of the Flying Spaghetti Monster?

From what deep and musty crevice of the spiritual zeitgeist did God’s doppleganger, the Flying Spaghetti Monster (FSM) originate?

Heretic!

The FSM has always and will always exist. The FSM has no origin. This isn’t The Green Lantern we’re talking about here, Bub!

How dare you conflate the puny “spaghetti monster” with the illustrious one !!

Why am I always the last nerd to find these things out? Anyway, I just ordered these, and I’m putting the cafepress mug with the pirate chart on it on my Christmas list. WWFSMD?