I think technically it's hot-smoked. The way we've done it, the bacon reaches 150F, then is cooled before slicing and packaging. I believe cold smoking is under 100F. The book Charcuterie says you can smoke bacon on a charcoal grill as well, by adding a few hot coals to a pan of hardwood sawdust and monitoring the temp. There are also those stovetop smokers, they might work for bacon if you monitor it closely so it doesn't get too hot, and if you have a good vent fan.
I remembered the name of the smoker we have, it's a Bradley - probably not worth it unless you plan to smoke more than just bacon, but it's been worth it for us (we make smoked turkey, pastrami, salmon, etc., in addition to bacon), especially since it's designed in such a way as to reduce the potentially carcinogenic components of the smoke.