There is a local company to me that produces smoked salt as well as black pepper, garlic, and host of other smoked items. It had even been stocked by the likes of Asda and Tesco for a while.
The smoked garlic was nice and in mildly flavoured dishes, you could appreciate it's gentle smoky overtones. The salt however, whilst being stained with a yellowy tar like colouration from the smoke was completely pointless. To the nose you could clearly tell it had been smoked but to taste especially in or on a dish, it was no different.