I've seen two, though only tracks in Montana, and I've spent plenty of time in wolverine country all across North America.
The first one was on a spring brown bear hunt in Alaska a dozen years ago, and the second was on a caribou hunt in the Northwest Territories--when I had a wolverine tag. Made a half-mile stalk and managed to get within 200 yards or so, and the hide is now on my office wall. It was an old male, with some broken teeth, so probably wasn't going to last much longer.
