The Scarpar Powerboard is an all-terrain, tank tread-based skateboard that goes surprisingly (and dangerously) fast. Excellent.
This crazy thing is pretty fast on packed sand and dirt. But, hell, it looks like it even climbs hills and handles snow pretty well. Foot pushing is for namby pambies from 1998.
Obviously Scarpar has a working prototype, but it doesn’t appear to be for sale yet. However, their mission statement seems to be primarily concerned with getting the sport out there, so hopefully we won’t have to wait too long to Scarpar to work.