I'm watching Diners, Drive-ins & Dives right now and one of the restaurants, Gatsby's, was shown using coffee beans along with wood for smoking pork chops in an ECB. From their menu:
Center Cut Pork Chop Bone-in chop, brined in vanilla bean then coffee bean smoked, served with seasonal veggies & our house made potato salad. $16.89
Sounds fantastic!