Ever heard of a fish spa? Apparently all the rage in regions in Asia, one dips one's feet in an aquarium of small fish that spend time nibbling at your toes, allegedly eating off all the dead skin. Piscine exfoliation, it would appear. I've heard, however, that you want to keep these things around the toes and ankles, where the skin is relatively thick.
Note: this article was originally published earlier, but is reposted due to a glitch.