oh man. the idempotent queue thing reminds me of the time i was working for a very-early-stage startup, and we'd managed to persuade an exec from a pretty big c

oh man. the idempotent queue thing reminds me of the time i was working for a very-early-stage startup, and we'd managed to persuade an exec from a pretty big company to sign up for a trial. our ceo got a very angry call the next morning; the guy had woken up to 300 email messages because our queue had hiccuped and, yeah, not idempotent.