Proposed:
A mention of Hitler or Nazi's in any thread or post which is ostensibly about something else will inevitably elicit a reference (likely irrelevant) to Godwin's Law.
For example, this reader comment from an Andrew Sullivan post:
I have very mixed feelings about the Arizona anti-illegal-immigrant laws, but the comparison to the Nazi's "show me your papers" smacks of Godwin's law of citing Hitler in arguments. Arizona is trying to deal with real problems, created by people who broke existing, serious, democratically-created laws.
“I don’t know, the idea of killing six million people because of their ethnicity strikes me as a bad idea. Sounds like something Hitler would do.”
“Godwin! Godwin! You lose!”