I was Googling "caffeine in coffee roasting smoke" because an
experience with it's bronchodilating effects and a question posed on
coffeegeek forums and found this:http://www.keopu.com/prcoffeeandhealth.html.And then I found this:
Coffee: The New Health Food? http://my.webmd.com/content/Article/80/96454.htm?printing=trueSo it's OK to drink, but don't inhale.  
Take care,
Nancy