It's been a long time since I last met an unsupported printer. Multifunction devices are a sore spot, but they are the epitome of amateur equipment in any case. Any half-decent printer has very good support from CUPS. And what smartphone are you talking about? I don't have much experience with iPhones, but my iPod works just fine (as much as the lack of iTunes allows) and my Android phones work perfectly. I wouldn't be surprised if Windows Phone has problems, but I woulnd't call Blackberries and Symbian devices smartphones by current standards.