I have used the Vibram Five Fingers to relativly good effect. These come with some limitations, namly that if you don't use them a LOT (I run ultras in them also), then you won't want to just go out for a long hike/hunt in them right at first. You'll wind up hobbled unless you build into them. (Enter the barefoot vs shod arguments.) Also, they are not that great in the hard cold. There isn't much insulation.
On the upside, you can feel EVERYTHING under your feet. If you step on a cricket you can count his legs. They are soft and flexable. Some models have pretty good traction, and all of them are servicable off road.
You probably wouldn't want these to be your only footware, but they do have a place. Unfortunatly, they have really caught on the past three or four years and have nearly doubled in price.