It's an ATV. It's a jet ski. It's both! Just don't confuse the two. The Quadski is about to debut, and it won't be cheap. The personal amphibious vehicle will do 45 on land as a four-wheeler. Take it to the water, the wheels fold up and it's a personal watercraft, likewise doing 45 across the waves. The developer, Alan Gibbs, says his Quadski should be on the market in the next couple of months. Price tag? About $40,000. I guess you better do a lot of surf and turf to justify paying that price. DB