I see these fairly often at Jay Peak. When I was at Vail last year they had sunset "snowbike tours", but its' last day was the day before I arrived.
I also see those "skateboard attached to a ski" things that I dont really undestand at Jay Peak. I guess having your feet attached to a snowboard is too restricting for some?
I think skateboarders just dig it because it is literally skateboarding on snow.