Bonafide and documented! Cool! Thanks, tsuwm!

So it was originally "ands" and the "ands" was a nounified conjuction that stood on its own in the phrase, so that's why we say it with the "and" accented today. When you say "coffee and donuts" the "and" drops in intonation, but in "coffee-and" the "and" rises.

Oh, and Jackie, I've always pronounced coffee "CAW-fee". Think it's a New York regional thing.