If you have the cash, you want to deliver it in kind (such as corn, buy corn in the futures market, buy the 0705 contract (sign the contract that expires in May 2007), and just take the money to buy the goods when it expires. If you don't want to buy the real thing, transfer it before the contract expires.
One of the characteristics of futures: the margin system, that is, when buying and selling contracts, you only need to pay a certain margin (about 10% full margin) to do the full transaction. Is to fight big with small.
If you want to know more about futures, please add me QQ 18668 158.