17.5 hours. Thanks all. I've been saying "Well, no - I don't do that anymore" to myself all day.

Rick, you got 'detoxed' in the hospital. Supposedly, after about 48 hours the nicotine is out of the body. Low/diminshing levels of nicotine are what trigger the cravings. No nicotine, and what you have is the memory of a craving. That's how I understand it, although I could be full of crap. Maybe someone who knows about addiction could jump in.