Three years ago, at age 15, Ian Purkayastha started importing truffles and selling them, for up to $5,000 a pound, to restaurants and fine food shops from his home in Fayetteville, Ark. Purkayastha grew up in Houston, where as a young boy he foraged for wild mushrooms in the forests near his parents' home. Importing truffles is tricky work, involving four different federal agencies and a race against time: Truffles have a shelf life of only seven days. Purkayastha is opening a truffle orchard in Arkansas--the first in the U.S.--and has "close to $1 million in sales."