I LIVE for chocolate, and luckily don't have to diet.. (sorry ladies, please dont hit me)
but, I've "heard" that tostitos and salsa is a very healthy snack that is fat free. At least, home made salsa is. Who knows what's in that jarred stuff LOL
So, when I've got munchies at night,that's what I eat. I crack open a jar of home made salsa, grab my bag of tostitos and munch away.
Hope this helps.
PS: or you could try the "Cream Saver" hard candies that are chocolate flavoured? Ya know? one or two candies that you can suck on for a while can't hurt a diet that much, can it?